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Decarbonylative C(sp2)–C(sp2) reductive cross-coupling of aroyl fluorides with aryl bromides by palladium/cobalt co-catalysis

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Org. Chem. Front., 2024, Advance Article
DOI: 10.1039/D4QO00305E, Research Article
Chen He, Zhiyong Song, Wei Yao, Rui Lin, Yuanhong Ma
Herein, we report a decarbonylative C(sp2)–C(sp2) reductive cross-coupling of aroyl fluorides with aryl bromides by palladium and cobalt co-catalysis.
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Blue light-mediated carbene transfer reaction of thioesters with diazoesters: efficient synthesis of tetrasubstituted Z-enol esters

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Org. Chem. Front., 2024, Advance Article
DOI: 10.1039/D4QO00265B, Research Article
Shuncheng Wang, Hua Zhang, Jin Yang, Dongfang Zhang, Xin-Ping Hui
An efficient metal-free, blue light-mediated carbene transfer reaction of thioesters with diazoesters has been achieved. This protocol produced tetrasubstituted Z-enol esters containing arylsulfur groups in good yields under mild conditions.
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Cyclization reactions of 1,6-dienes and 1,6-enynes by dual cobalt photocatalysis

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Org. Chem. Front., 2024, Advance Article
DOI: 10.1039/D4QO00311J, Research Article
Pei-Ting Li, Zi-Fa Shi, Wei Yu
Two triphenylamine-derived organophotocatalysts were developed. Their photocatalytic capacity was exploited to enable the [CoIII]-H-mediated cycloisomerization of 1,6-dienes and reductive cyclization of 1,6-enynes under visible light irradiation.
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Nickel metallaphotoredox-catalyzed C–O bond activation/Csp2–Csp3 coupling enabled by phosphine

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Org. Chem. Front., 2024, Advance Article
DOI: 10.1039/D4QO00310A, Research Article
Jiaxi Fang, Ziheng Jian, Huan Liu, Yuting Wang, Xianbo Yu, Zehuai Mou, Huifei Wang
A novel and general nickel/photoredox dual catalysis platform for benzyl alcohol C–O bond activation/Csp2–Csp3 cross coupling of benzothiazolyl bromide and free alcohol, enabled by the catalytic generation of an alkyl radical, is reported.
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Spiro-centre substitution effects in the intramolecular spin–spin interactions of spirobiacridine diradicals

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Org. Chem. Front., 2024, Advance Article
DOI: 10.1039/D4QO00419A, Research Article
Open Access
Shinichi Ogawa, Takuya Kanetomo, Masaya Enomoto
Spirodiradicals with the Si and Ge spiro atoms exhibit a S = 1 state. The magnetic interaction in the Si derivative was found to be lower than that in the Ge derivative, implying a negative effect on σ*(Si–Cα)–π* hyperconjugation.
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Three-component Friedel–Crafts-type difunctionalization of ynamides with (hetero)arenes and iodine(III) electrophile

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Org. Chem. Front., 2024, Advance Article
DOI: 10.1039/D4QO00489B, Research Article
Open Access
Jun Kikuchi, Toya Nagata, Shingo Ito, Naohiko Yoshikai
A three-component Friedel–Crafts type difunctionalization of ynamides with an iodine(III) electrophile and electron-rich (hetero)arenes has been developed, enabling regio- and stereoselective synthesis of densely functionalized enamides.
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Metal-Free Cascade O-H Double Insertion Between I(III)/S(VI)-Ylides, Carboxylic Acids, and Alcohols: Modular Access to Unsymmetrical α,α-O,O-Substituted Ketones

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Org. Chem. Front., 2024, Accepted Manuscript
DOI: 10.1039/D4QO00453A, Research Article
Shang-Shi Zhang, Jiaohang Wei, Wen-Xuan Zou, Qiong Hu, Mei-Zhu Bao, Dan-Ting Shen, Lin Xiao, Jia-Lin Song, Xiang Liu
The synthesis of unsymmetrical α,α-O,O-substituted ketones via O-H double insertion is appealing but remains constrained due to the lack of compatible coupling partners or uncontrollable selectivity. Herein, we present a...
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Correction: Stereodivergent and enantioselective total syntheses of isochaetominines A–C and four pairs of isochaetominine C enantiomers: a six-step approach

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Org. Chem. Front., 2024, Advance Article
DOI: 10.1039/D4QO90034K, Correction
Open Access
  This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
Zhong-Yi Mao, Hui Geng, Tian-Tian Zhang, Yuan-Ping Ruan, Jian-Liang Ye, Pei-Qiang Huang
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Visible-light-mediated catalyst-free synthesis of trifluoromethyl(spiro)-epoxides bearing contiguous quaternary centers

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Org. Chem. Front., 2024, Advance Article
DOI: 10.1039/D4QO00184B, Research Article
Jingchuan Lin, Yu Zhang, Jinxin Wang, Xinyu Han, Shenglan Zhu, Tong Li, Yanping Zhu, Wei-Dong Zhang
Herein, we describe a non-covalent complex-mediated epoxidation strategy that can yield highly selective central spiro-epoxides by irradiation with visible light without the need for catalyst addition.
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Sulfamide instead of urea in Biginelli reaction: from black box to reality

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Org. Chem. Front., 2024, 11,2155-2160
DOI: 10.1039/D3QO01926H, Research Article
Alexander Yu. Lyapunov, Andriy V. Tarnovskiy, Sergey Yu. Boron, Eduard B. Rusanov, Galyna P. Grabchuk, Dmytro M. Volochnyuk, Serhiy V. Ryabukhin
The scope and limitations of the classical Biginelli reaction have been expanded to principally novel substrates: sulfamide and its monosubstituted analogues.
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Unprecedented single-electron-transfer reduction-based N → C acyl migration reactions of imides enabled by redox-neutral photocatalysis

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Org. Chem. Front., 2024, 11,2344-2350
DOI: 10.1039/D3QO01955A, Research Article
Linge Huai, Li Zhang, Zhentao Wang, Yewen Fang
N → C acyl migration: in the absence of a base, redox-neutral photocatalyzed acyl migration reactions have been realized via the reaction of N-vinylimides with alkyl radicals derived from alkyl silicates.
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Stereoselective skeletal modification of tryptanthrins to install chiral piperidine-2-ones enabled by Brønsted acid catalysis

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Org. Chem. Front., 2024, 11,2171-2177
DOI: 10.1039/D3QO02029K, Research Article
Rong Zeng, Xiang Zhang, Yuan-Yuan Lei, Zhuo-Zhuo Zhang, Min Jiang, Qing-Zhu Li, Jun-Long Li, Bo Han
An asymmetric formal [4 + 2] cyclisation between azlactones and aza-dienes derived from simple tryptanthrins has been developed. With this established protocol, yielding a series of novel piperidine-2-one-fused tryptanthrins with up to >99 : 1 er under mild conditions.
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Iron(III)/quinoxaline-derived N,N-ligand catalyzed oxygen transfer reaction of N-vinyl nitrones through selective 4π-electrocyclization and N–O bond cleavage

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Org. Chem. Front., 2024, 11,2277-2282
DOI: 10.1039/D3QO01999C, Research Article
Yan-Jiao Lu, Feng-Lan Lu, Jin-Qi Zhang, Chun-Hua Chen, Cui Liang, Xiao-Pan Ma, Dong-Liang Mo
We describe an iron(III)/quinoxaline-derived N,N-ligand promoted O-transfer reaction of N-vinyl nitrones through selective O-4π-electrocyclization and N–O bond cleavage to prepare a variety of 2,5-dihydrooxazoles in good yields.
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Synthesis of benzothiophenes via sulfonium-[3,3]-rearrangement of aryl sulfoxides with allenenitriles

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Org. Chem. Front., 2024, 11,2208-2214
DOI: 10.1039/D4QO00121D, Research Article
Lei Zhang, Kun Wan, Huanhuan Wang, Mengyao Wang, Ao Cui, Xin Huang, Bo Peng
A facile synthesis of benzothiophenes from readily available aryl sulfoxides and allenenitriles has been established through sulfonium-rearrangement triggered cyclization.
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Dynamic kinetic resolution of α-F-β-ketone amides (esters) via Ir/f-diaphos-catalyzed asymmetric hydrogenation

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Org. Chem. Front., 2024, 11,2201-2207
DOI: 10.1039/D4QO00125G, Research Article
Pengtao Yang, Dingguo Song, Lingxin Chen, Xianghua Zhao, Yirui Chen, Feiyang Shen, Fei Ling, Weihui Zhong
Highly reactive and highly stereoselective asymmetric hydrogenation of α-F-β-ketone amides (esters) via Ir/f-diaphos-catalyzed dynamic kinetic resolution is reported.
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Deoxygenation of N-heterocyclic N-oxides using isopropanol as a recyclable reductant

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Org. Chem. Front., 2024, 11,2249-2268
DOI: 10.1039/D4QO00208C, Research Article
Ho Kyeong Ryu, Yun Do Song, Jun Hee Lee
An organic photoredox-based recyclable strategy that facilitates the chemoselective deoxygenation of various functionalised N-heterocyclic N-oxides is presented.
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Synthesis of enantiopure 1,2,3-triazolylidene-type mesoionic carbene (MIC) conjugate acids featuring a rigid bicyclic scaffold

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Org. Chem. Front., 2024, 11,2178-2181
DOI: 10.1039/D4QO00269E, Research Article
Vojtěch Dočekal, Mohand Melaimi, Simona Petrželová, Jan Veselý, Xiaoyu Yan, Guy Bertrand
Chiral NHCs have found numerous applications as ligands for transition metals and in their own right for asymmetric catalysis. We report a synthetic route from L-malic acid to enantiopure 1,2,3-triazoliums with the chiral center in a fused ring.
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Iridium-catalyzed reductive γ-lactonization of ortho-acylbenzoic acids in water: sustainable access to phthalides

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Org. Chem. Front., 2024, 11,2220-2230
DOI: 10.1039/D3QO02019C, Research Article
Yang Chen, Jingyu Zhang, Hongguang Du, Renshi Luo, Jiaxi Xu, Zhanhui Yang
Iridium-catalyzed reductive γ-lactonization of ortho-acylbenzoic acids in water provides a practical and sustainable route to phthalides.
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Electrode-switchable: exploring this new strategy to achieve regiodivergent azidoiodination of alkenes

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Org. Chem. Front., 2024, 11,2189-2194
DOI: 10.1039/D3QO01935G, Research Article
Xin-Lei Sun, Chen-Xi Xia, Yue Ren, Yu-Jin Li, Zhi-Qian Cao, Ling-Guo Meng
An “electrode-switchable” organic electrochemistry method for the azidoiodination of alkenes, where the choice of anode dictates the regiodivergent alkene azidoiodination, reveals a novel pathway for controlled regioisomers.
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Photo-induced catalyst-free formal carbon insertion of acylsilanes into B–B and B–Si bonds

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Org. Chem. Front., 2024, 11,2339-2343
DOI: 10.1039/D4QO00139G, Research Article
Xiongxiong Lu, Qingbin Zhao, Hao Zhang, Pan Xu, Xuenian Chen, Zhenxing Liu
A formal carbon insertion of acylsilanes into B–B and B–Si bonds has been developed. The in situ formed siloxycarbene under blue LED irradiation worked as the intermediate for the reaction. When 2-furyl and 2-thiophenyl acylsilanes were used, the B(pin) ring was enlarged to a six-membered ring.
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Origin of site-selectivity of hydrogen atom transfer in carbohydrate C–H alkylations via photoredox catalysis

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Org. Chem. Front., 2024, 11,2269-2276
DOI: 10.1039/D4QO00073K, Research Article
Yujie Ji, Lingfei Hu, Han Gao, Yan-Bo Wu, Xiangying Lv, Gang Lu
Two major factors, i.e., C–H σ orbital energy and C–H BDE, account for the HAT site-selectivity of carbohydrates with the quinuclidine radical cation.
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Electron donor–acceptor complex photoactivation for deaminative alkynylation, alkenylation and allenylation: a comprehensive study

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Org. Chem. Front., 2024, 11,2231-2240
DOI: 10.1039/D4QO00177J, Research Article
Romain Lapierre, Lina Truong, Matthieu Hedouin, Hassan Oulyadi, Bruno Schiavi, Alexandre Jean, Philippe Jubault, Thomas Poisson
Herein, we disclose our study toward photoinduced deaminative alkynylation, alkenylation and allenylation.
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Fe-catalyzed B–H and Si–H insertion reactions of gem-dihaloalkanes

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Org. Chem. Front., 2024, 11,2241-2248
DOI: 10.1039/D4QO00136B, Research Article
Xinyu Wang, Zhaobin Wang
We present an approach involving Fe-catalyzed B–H and Si–H insertion of gem-dichloroalkanes. In contrast to previous strategies, our method uses gem-dihaloalkanes as non-stabilized carbene precursors and operates through a radical reaction pathway.
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A dearomatization–rearomatization strategy for construction of 4H-quinolizin-4-ones via C–H bond functionalization of pyridines

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Org. Chem. Front., 2024, 11,2319-2325
DOI: 10.1039/D3QO01990J, Research Article
Dong Qiu, Yijin Su
Herein, the synthesis of 4H-quinolizin-4-ones from N-(2-methoxy-2-oxoethyl) pyridinium salts and alkenes through dearomative cycloaddition and rearomative ring expansion has been developed.
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Regioselective electrochemical cascade C–H sulfonylation–bromination of indolizines to access difunctionalized indolizines

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Org. Chem. Front., 2024, 11,2306-2312
DOI: 10.1039/D4QO00035H, Research Article
Wenxuan Jiang, Xiang Liu, Chuanying Zhu, Meiyi Chen, Weidan Li, Hua Cao
Regioselective electrochemical C–H sulfonylation–bromination between indolizines, sodium sulfinates, and KBr has been established in an undivided cell, in which KBr serves as both the brominating agent and electrolyte.
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Electrochemical remote C(sp3)–H thiocyanation

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Org. Chem. Front., 2024, 11,2283-2288
DOI: 10.1039/D4QO00032C, Research Article
Xinyu Pang, Hui He, Xiangrui Meng, Linbao Zhang, Shaofei Ni, Ming Li, Weisi Guo
An electrochemical thiocyanation of distal C(sp3)–H bonds based on amidyl radical-mediated 1,5-HAT has been developed. The transformation is highly site-selective and compatible with primary, secondary, and tertiary sulfonamides, and bioactive derivatives.
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Nickel/photoredox-catalyzed carbonylative transformations of α-phosphorus-, α-sulfur-, and α-boron-substituted alkyl halides

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Org. Chem. Front., 2024, 11,2297-2305
DOI: 10.1039/D4QO00167B, Research Article
Open Access
  This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
Le-Cheng Wang, Xiao-Feng Wu
A novel dual nickel/photoredox catalyzed direct amino- and alkoxycarbonylation of α-heteroatom substituted organohalides has been developed.
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Advancement in the C–H bond alkylation of (hetero)arenes catalyzed by the most abundant transition metal–iron

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Org. Chem. Front., 2024, 11,2397-2417
DOI: 10.1039/D4QO00063C, Review Article
Chandini Pradhan, Benudhar Punji
Advancement in the direct C–H bond alkylation of arenes and heteroarenes using the catalysts based on the most abundant transition metal, iron, is summarized.
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Correction: Cu-catalyzed arylation of S-tosyl peptides with arylboronic acids

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Org. Chem. Front., 2024, 11,2418-2418
DOI: 10.1039/D4QO90029D, Correction
Open Access
  This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
Junjie Ying, Jingrong Huang, Chenguang Liu, Fa-Jie Chen, Chunfa Xu, Fen-Er Chen
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NHC and photoredox catalysis dual-catalyzed 1,4-mono-/di-fluoromethylative acylation of 1,3-enynes

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Org. Chem. Front., 2024, Advance Article
DOI: 10.1039/D4QO00372A, Research Article
Jiuli Xia, Ruiyang Ma, Lihong Wang, Jiaqiong Sun, Guangfan Zheng, Qian Zhang
NHC and photocatalysis dual-catalyzed mono/difluoromethylative acylation of 1,3-enynes was realized, providing fluormethyl-substituted allenyl ketones. SO2 might play a critical role in achieving high reactivity and selectivity.
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Assembly of ionic supramolecular polymers using a decacationic pillar[5]arene to noncovalently crosslink hyaluronic acid for short DNA delivery

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Org. Chem. Front., 2024, Advance Article
DOI: 10.1039/D4QO00447G, Research Article
Qian Li, Danying Ma, Yue-Yang Liu, Hui Wang, Wei Zhou, Dan-Wei Zhang, Zhan-Ting Li
A multicationic pillar[5]arene noncovalently crosslinks hyaluronic acid to afford ionic supramolecular polymers for intramolecular delivery of short DNA.
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Selective deletion of one carbon atom from C60 through benzylamine mediated reactions

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Org. Chem. Front., 2024, Advance Article
DOI: 10.1039/D4QO00449C, Research Article
Yaqiong Wang, Yiran Wu, Yuming Yu, Jie Su, Yi Qiu, Liangbing Gan
Benzylamine selectively adds to one of the two carbonyl groups on the 9-membered orifice to form an N,O-aminal moiety. Subsequent oxidation and hydrogen atom transfer lead to a decarboxylation process and formation of a nor [59]fullerene derivative.
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Visible-light Induced [1, 3]-Brook Rearrangements of α-Ketoacylsilanes and Its Subsequent Trapping in a Tandem Annulation with 1, 3, 5-Triazinanes and Azomethine Imines

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Org. Chem. Front., 2024, Accepted Manuscript
DOI: 10.1039/D4QO00463A, Research Article
Zhong Zhang, Sirui Wu, Yuqiao Zhou, Bao-Lin Li, Siyue Xiao, Xiaohu Zhao, Zhipeng Yu
An unusual visible light-induced [1, 3]-Brook rearrangement of α-ketoacylsilanes for cascade cyclization with 1,3,5-triazinanes and C,N-cyclic azomethine imines has been developed under catalyst-free and mild reaction conditions. The strategy offers...
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Metal-free photoinduced denitrogenative alkylation of vinyl azides with alkyl radicals toward ketones

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Org. Chem. Front., 2024, Advance Article
DOI: 10.1039/D4QO00280F, Research Article
Hui Yin, Siqi Jian, Xiujuan Feng, Ming Bao, Xuan Zhang
A metal-free method for the synthesis of ketones via a visible-light induced denitrogenative alkylation of vinyl azides with alkyl radicals is presented.
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Copper-catalyzed oxidative sulfenylation and alkylation of indolin-2-ones for direct construction of sulfur-substituted quaternary carbons

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Org. Chem. Front., 2024, Advance Article
DOI: 10.1039/D4QO00491D, Research Article
Yun-Hao Zhang, Yi-Nuo Wang, Zi-Yu Liu, Si-Han Zheng, Guang-Lin Li, Dexin Feng, Da-Zhen Xu
A rapid and green one-pot access to S-substituted quaternary carbon centers from commercially available feedstock chemicals has been established, providing complex molecules with high chemoselectivity by the use of air as the terminal oxidant.
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Base- and metal-free visible-light driven site-selective α-C(sp3)–H functionalization reaction of glycine derivatives with hydroxamic acid derivatives

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Org. Chem. Front., 2024, Advance Article
DOI: 10.1039/D4QO00425F, Research Article
Shiyun He, Hongying Fan, Xue Zhang, Meiling Ye, Jian Chen, Jinyu Hou, Tianle Huang, Li Guo, Guanghui Lv, Yong Wu
A visible-light-mediated radical–radical cross-coupling reaction between hydroxamic acid and N-phenyl glycine derivatives under base and metal free conditions is reported. A series of unnatural amino acids and peptides were obtained in good to excellent yields with good chemo-selectivity.
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A retro-Mannich mediated transformation of Morita–Baylis–Hillman ketones to saturated imidazo[1,2-a]pyridines

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Org. Chem. Front., 2024, Advance Article
DOI: 10.1039/D4QO00352G, Research Article
Sachin Sharma, Ajit Kumar Jha, Srinivasan Easwar
Two fruits felled with one stone! – a proof of mechanism and a synthetic method that delivers a privileged heterocyclic motif.
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Development of a photoenzymatic one-pot hybrid system for the direct synthesis of 3,3-disubstituted indole-2-ketones from N-methyl indoles

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Org. Chem. Front., 2024, Advance Article
DOI: 10.1039/D4QO00371C, Research Article
Yao Yao, Yuan Yu, Ming-Liang Shi, Xin-Yue Fan, Ru-De Lin, Kun Li, Wen-Dian Li, Fei-Yan Tao, Na Wang
The effective combination of photocatalysis and enzyme catalysis has been widely utilized for the synthesis of high-value-added products.
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Fully atom-economic access to spiro-cyclic skeletons through photoredox-induced hydrogen transfer/Giese addition/dearomative cyclization/protonation cascade

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Org. Chem. Front., 2024, Advance Article
DOI: 10.1039/D4QO00317A, Research Article
Guohui Zeng, Hui Luo, Kai Jiang, Jianpeng Cai, Biaolin Yin
Amine-tethered spiro-cyclic skeletons were obtained through photo-induced 100%-atom-economic dearomatization, involving the cleavage of the α-C(sp3)–H of amines. Pentacyclic framework was achieved from pyridinyl ring within two steps.
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Regioselective Oxidative Cleavage of Conjugated Dienes to Access α,β–Unsaturated Nitriles

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Org. Chem. Front., 2024, Accepted Manuscript
DOI: 10.1039/D3QO02101G, Research Article
Yuqing Fu, Yijia Leng, Haotong Bai, Jiaxi Xu, Ning Chen
A highly regioselective oxidative cleavage method has been developed for the synthesis of α,β-unsaturated nitriles from unsymmetric conjugated dienes. This transformation selectively cleaved the terminal C=C double bond, providing moderate...
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Substituent-controlled divergent cyclization reactions of benzo[c][1,2]dithiol-3-ones and hexahydro-1,3,5-triazines

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Org. Chem. Front., 2024, Advance Article
DOI: 10.1039/D4QO00356J, Research Article
Bohao Zhang, Sifan He, Na Dong, Antong Zhu, Haojie Duan, Dunjia Wang, Yao Zhou
An unprecedented metal-free divergent cyclization reaction of benzo[c][1,2]dithiol-3-ones with hexahydro-1,3,5-triazines to assemble six- and eight-membered N-containing heterocycles has been developed.
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Catalytic Ortho C-H Methylation and Trideuteromethylation of Arylthianthrenium Salts via the Catellani Strategy

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Org. Chem. Front., 2024, Accepted Manuscript
DOI: 10.1039/D4QO00506F, Research Article
Chen Chen, Xiao-Xu Zhang, Zi-Yi Wang, Chunjie Ni, Bolin Zhu
We reported a Pd/NBE cooperative catalyzed ortho C−H methylation and trideuteromethylation of arylthianthrenium salts, enabling the efficient synthesis of a wide variety of (trideutero)methylated arenes in moderate to good yields....
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Halogen-Bond-Promoted Direct Cross-Coupling of Ethyl 3-bromo-3-alkyl-2,2-difluoropropanoate with Coumarins/Quinolinones

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Org. Chem. Front., 2024, Accepted Manuscript
DOI: 10.1039/D4QO00484A, Research Article
Guoliang Pu, Shi-Yuan Song, Jian Yang, Peng Guo, Jia Jia, Peijun Liu, Xuefei Li, Ping Liu, Chun-Yang He
Herein, we developed a practical method for the direct cross-coupling of ethyl 3-bromo-3-alkyl-2,2-difluoropropanoate with coumarins/quinolinones, leveraging a halogen bond as the pivotal non-covalent interaction. Employing this protocol, a library of...
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NHC-Catalyzed Stereoselective Synthesis of Spirooxindole Lactones by in situ Generated Oxindole-embedded o-Quinone Methides and Aldehydes

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Org. Chem. Front., 2024, Accepted Manuscript
DOI: 10.1039/D4QO00347K, Research Article
Zhengqiang Cao, Fang Hu, Yunpeng Chu, Jiaxue Pei, Xin-Ping Hui
A novel N-heterocyclic carbene-catalyzed asymmetric [4 + 2] annulation of in situ generated oxindole-embedded o-quinone methides with aldehydes has been developed for the assembly of complicated spirooxindoles. The methodology provides...
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Diverting the Mannich reaction to access 2,2-disubstituted indolin-3-ones by merging 1,2-aryl migration and copper-catalyzed aerobic oxidation

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Org. Chem. Front., 2024, Advance Article
DOI: 10.1039/D4QO00481G, Research Article
Jia-Chen Xiang, Yu-Die Wang, Peng Yuan, Hui-Min Zhu, Tong Lei, An-Xin Wu, Zhixin Liao
Three typical substrates for the Mannich reaction, p-anisidine, aldehyde, and a nucleophile, did not afford the predictable linear Mannich base under an aerobic copper oxidation condition, but rendering a 2,2-disubstituted indolin-3-one product.
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Iridium-catalyzed asymmetric hydrogenation of 5-hydroxypicolinate pyridinium salts under batch and flow: stereodefined access to cis-configurated hydroxypiperidine esters

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Org. Chem. Front., 2024, Advance Article
DOI: 10.1039/D4QO00322E, Research Article
Zhi Yang, Shangxian Luan, Linxi Wan, Jingxi Chen, Xiaofang Wei, Pei Tang, Fen-Er Chen
An iridium-catalyzed asymmetric hydrogenation of 2-esteryl-5-hydroxypyridinium salts is reported, providing chiral cis-5-hydroxypiperidine-2-carboxylates in excellent yields with high levels of enantioselectivities and diastereoselectivities.
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Thiourea as a precatalyst for the electron donor–acceptor complex photoactivation platform of oxime esters

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Org. Chem. Front., 2024, Advance Article
DOI: 10.1039/D4QO00424H, Research Article
Haichen Mao, Yuting Zhang, Hengrong Cao, Qianqian Shi, Yu Lan, Junbiao Chang, Bo Zhu
A novel electron donor–acceptor (EDA) complex catalysis strategy has been developed using thiourea as a precatalyst under blue LED irradiation. Using 2–5 mol% of thiourea, various nitrogen-containing compounds were successfully synthesized.
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Integrating continuous flow reaction and work-up: chiral amine resolution, separation and purification using a novel coalescing filter system

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React. Chem. Eng., 2024, Accepted Manuscript
DOI: 10.1039/D4RE00442F, Paper
Open Access
  This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
Bethan May Rowley, Lisa Alice Thompson, Luke Power, James Daglish, Emma Parks, James Birbeck, Stephen P Marsden, Nikil Kapur, John Blacker
To maximize the benefits of a continuous flow reaction, a continuous work-up is also needed. Herein, we present a process design and novel equipment for a continuous amine resolution reaction,...
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A Hierarchical Surrogate Approach to Biomass Ethanolysis Reaction Kinetic Modelling

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React. Chem. Eng., 2024, Accepted Manuscript
DOI: 10.1039/D4RE00378K, Paper
Ailís O'Shea, Conall McNamara, Prajwal Rao, Mícheál Séamus Howard, Mohammad Reza Ghaani, Stephen Dooley
The reaction mechanism and kinetics of the sulfuric acid catalysed ethanolysis of glucose, cellulose, xylan, and corncob was investigated using a combination of experiments and empirical reaction mechanism modelling. The...
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Scalable electrified cementitious materials production and recycling

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Energy Environ. Sci., 2024, Advance Article
DOI: 10.1039/D4EE03529A, Paper
Open Access
Xiao Kun Lu, Wenxin Zhang, Brianna N. Ruggiero, Linsey C. Seitz, Jiaqi Li
Our electrochemical production uses carbon-free rocks, water electrolysis, and CO2 capture/circulation for carbon-neutral/negative cement and green H2, turning cement from the second-largest industrial CO2 emitter to a gigaton-scale CCUS enabler.
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