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Donor–acceptor fluorophores as efficient energy transfer photocatalysts for [2 + 2] photodimerization

Org. Biomol. Chem., 2020, Advance Article
DOI: 10.1039/C9OB02735A, Paper
Qing-An Wu, Feng Chen, Chen-Chao Ren, Xue-Fen Liu, Hao Chen, Liang-Xuan Xu, Xiao-Cong Yu, Shu-Ping Luo
Donor–acceptor fluorophores can act as efficient energy transfer photocatalysts to activate enone substrates, realizing photodimerization and isomerization reaction of enone substrates without precious metal photocatalysts.
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A silver-catalyzed radical ring-opening reaction of cyclopropanols with sulfonyl oxime ethers

Org. Biomol. Chem., 2020, Advance Article
DOI: 10.1039/D0OB00055H, Paper
Xiaobao Zeng, Xin Wang, Yanan Zhang, Li Zhu, Yu Zhao
A simple and efficient method for the radical ring-opening reaction of cyclopropanols with sulfonyl oxime ethers catalyzed by AgNO3 is developed, affording γ-keto oxime ethers in moderate to good yields.
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Discrimination of cellular developmental states focusing on glycan transformation and membrane dynamics by using BODIPY-tagged lactosyl ceramides

Org. Biomol. Chem., 2020, Advance Article
DOI: 10.1039/D0OB00547A, Paper
Kenta Arai, Atsuko Ohtake, Shusaku Daikoku, Katsuhiko Suzuki, Yukishige Ito, Kazuya Kabayama, Koichi Fukase, Yoshimi Kanie, Osamu Kanie
Different cellular states were discriminated by analysing either the glycan transformation of exogenously introduced fluorescently tagged probe molecules or fluorescence recovery after photobleaching before conversion.
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Rhodium-Catalyzed ortho-Acrylation of Aryl Ketone O-Methyl Oximes with Cyclopropenones

Org. Biomol. Chem., 2020, Accepted Manuscript
DOI: 10.1039/D0OB00064G, Communication
Yafeng Liu, Yuan Tian, Kexin Su, Xin Guo, Baohua Chen
An efficient Rh-catalyzed ortho-acrylation reaction for the synthesis of chalcones from O-methyl ketoximes and cyclopropenones via C–H bond activation has been described. This cross-coupling reaction exhibits high functional group tolerance...
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Recent Progress on Transition Metal-catalysed Regioselective C–H Transformations Based on Noncovalent Interactions

Org. Biomol. Chem., 2020, Accepted Manuscript
DOI: 10.1039/D0OB00703J, Review Article
Yoichiro Kuninobu, Takeru Torigoe
Transition metal-catalysed C–H transformations are powerful tools to obtain functionalised organic molecules from simple starting materials. To control regioselectivity is one of the most important issues in C–H transformations. Since...
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Synthesis of unsymmetrical benzils via palladium-catalysed α-arylation–oxidation of 2-hydroxyacetophenones with aryl bromides

Org. Biomol. Chem., 2020, Advance Article
DOI: 10.1039/D0OB00575D, Paper
Open Access
Takanori Matsuda, Souta Oyama
Unsymmetrical benzils are synthesised by a one-pot tandem palladium-catalysed α-arylation and oxidation of 2-hydroxyacetophenones with aryl bromides.
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Copper(I)/Ganphos catalysis: enantioselective synthesis of diverse spirooxindoles using iminoesters and alkyl substituted methyleneindolinones

Org. Biomol. Chem., 2020, Advance Article
DOI: 10.1039/D0OB00546K, Paper
Hao Cui, Ke Li, Yue Wang, Manman Song, Congcong Wang, Donghui Wei, Er-Qing Li, Zheng Duan, François Mathey
A copper/Ganphos-catalyzed asymmetric 1,3-dipolar cycloaddition of glycine iminoesters with alkyl substituted 3-methylene-2-oxindoles is described, producing the spiro[pyrrolidin-3,3'-oxindole]s in good yields with high ee.
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Blue emissive dimethylmethylene-bridged triphenylamine derivatives appending cross-linkable groups

Org. Biomol. Chem., 2020, Advance Article
DOI: 10.1039/D0OB00622J, Paper
Kangyu Zhou, Hongfei Pan, Yongjie Zhang, Houchen Wang, Xiaofei Dong, Xiangkui Ren, Xianggao Li, Shirong Wang, Zhijian Chen
Blue-emissive and cross-linkable dimethylmethylene-bridged triphenylamine derivatives were synthesized and their optical and electrochemical properties were investigated.
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Three-component synthesis of 1,4-benzothiazines via iodide-catalyzed aerobic C–H sulfuration with elemental sulfur

Org. Biomol. Chem., 2020, 18,3234-3238
DOI: 10.1039/D0OB00074D, Communication
Jingjing Jiang, Xiaolong Tuo, Zhuquan Fu, Huawen Huang, Guo-Jun Deng
Five to Six: Beyond the well-established thiazole formation from elemental sulfur, this method provides the first access to the corresponding six-membered N,S-heterocyclic products via direct functionalization of multiple C–H bonds.
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Phenylboronic acid-catalyzed tandem construction of S–S and C–S bonds: a new method for the synthesis of benzyl disulfanylsulfone derivatives from S-benzyl thiosulfonates

Org. Biomol. Chem., 2020, 18,3243-3248
DOI: 10.1039/D0OB00442A, Communication
Raju Jannapu Reddy, Md. Waheed, Gamidi Rama Krishna
A novel and unique phenylboronic acid-catalyzed tandem construction of S–S and C–S bonds via dimerization–sulfonylation has been disclosed for the synthesis of benzyl disulfanylsulfone derivatives.
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The quasi-irreversible inactivation of cytochrome P450 enzymes by paroxetine: a computational approach

Org. Biomol. Chem., 2020, 18,3334-3345
DOI: 10.1039/D0OB00529K, Paper
Emadeldin M. Kamel, Al Mokhtar Lamsabhi
The potency of paroxetine as a P450 inhibitor is mainly attributed to the availability of two active sites on its structure, its compatibility with P450's active site and the ease of its tight coordination to heme iron.
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Synthesis of methylene cyclopropane-fused chromenes and dihydroquinolines by sequential [4 + 2]- and [1 + 2]-annulation

Org. Biomol. Chem., 2020, 18,3303-3311
DOI: 10.1039/D0OB00389A, Paper
Tianyu Lu, Xuange Zhang, Zhiwei Miao
A base promoted sequential [4 + 2]- and [1 + 2]-annulation of 2-hydroxychalcones or 2-tosylaminochalcones with prop-2-ynylsulfonium salts was developed.
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Base-promoted 1,6-conjugate addition of alkylazaarenes to para-quinone methides

Org. Biomol. Chem., 2020, 18,3354-3359
DOI: 10.1039/D0OB00419G, Paper
Amritha Rayaroth, Rajat Kumar Singh, Kalyanakrishnan A. V., Krishna Hari, Alagiri Kaliyamoorthy
1,1,2-Triarylethanes embedded with an azaarene unit were prepared in a single step at ambient temperature via the sodium hexamethyldisilazide mediated 1,6-conjugate addition of unactivated alkylazaarenes on para-quinone methides (p-QMs).
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Synthesis of phenanthridines by I2-mediated sp3 C–H amination

Org. Biomol. Chem., 2020, 18,3312-3323
DOI: 10.1039/D0OB00433B, Paper
Benyao Fang, Jiao Hou, Jinyue Tian, Wenquan Yu, Junbiao Chang
An I2-mediated transition-metal-free sp3 C–H amination reaction is established for phenanthridine synthesis in an efficient and scalable manner.
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A base-promoted tandem approach to bicyclic 8-membered ring ketones

Org. Biomol. Chem., 2020, 18,3249-3253
DOI: 10.1039/D0OB00618A, Communication
Emerson E. F. dos Santos, Gabriela F. P. de Souza, Deborah A. Simoni, Airton G. Salles
A base-promoted tandem route toward unprecedented bicyclic furan/8-membered ring ketones is reported.
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Chiral bifunctional sulfide-catalyzed asymmetric bromoaminocyclizations

Org. Biomol. Chem., 2020, 18,3367-3373
DOI: 10.1039/D0OB00459F, Paper
Takumi Nakamura, Ken Okuno, Kazuma Kaneko, Masahiro Yamanaka, Seiji Shirakawa
A chiral bifunctional sulfide catalyst bearing a urea moiety promotes the enantioselective bromoaminocyclization of 2-allylanilines to produce optically active 2-substituted indolines.
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Gold(III)-catalyzed azide-yne cyclization/O–H insertion cascade reaction for the expeditious construction of 3-alkoxy-4-quinolinone frameworks

Org. Biomol. Chem., 2020, Advance Article
DOI: 10.1039/D0OB00745E, Paper
Jingjing Huang, Han Su, Ming Bao, Lihua Qiu, Yuanqing Zhang, Xinfang Xu
A gold-catalyzed cascade reaction has been developed, and it provides an expeditious access to 3-alkoxy-4-quinolines and applications in alkaloid synthesis.
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Dienaminodioate based multicomponent reactions with post-benzylic oxidative transformations mediated by DDQ

Org. Biomol. Chem., 2020, Accepted Manuscript
DOI: 10.1039/D0OB00721H, Paper
Jaice Ravindran, Velickakathu Yadhukrishnan, Reghuvaran Asha , Ravi Shankar Lankalapalli
Multicomponent reactions (MCRs) using dienaminodioate with post-benzylic oxidative transformation by DDQ that afforded a diverse array of products is described. An unprecedented rearrangement of 1,2-dihydropyridines (1,2-DHPs), 3CR products, to 2-pyridones...
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Synthesis of gem-difluoroalkenes via nickel-catalyzed allylic defluorinative reductive cross-coupling of trifluoromethyl alkenes with epoxides

Org. Biomol. Chem., 2020, Advance Article
DOI: 10.1039/D0OB00535E, Communication
Xiao-Yu Lu, Run-Chuang Jiang, Jia-Mei Li, Chuang-Chuang Liu, Qing-Qing Wang, Hai-Pin Zhou
A nickel-catalyzed defluorinative reductive cross-coupling of trifluoromethyl alkenes with epoxides has been developed.
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Efficient synthesis of a galectin inhibitor clinical candidate (TD139) using a Payne rearrangement/azidation reaction cascade

Org. Biomol. Chem., 2020, Accepted Manuscript
DOI: 10.1039/D0OB00910E, Paper
Jacob St-Gelais, Vincent Denavit, Denis Giguère
Selective galectin inhibitors are valuable research tools and could also be used as drug candidates. In that context, TD139, a thiodigalactoside galectin-3 inhibitor, is currently being evaluated clinically for the...
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CISF needs 4,500 addl personnel to man new 'Metro' routes

With the Delhi Metro expanding its wings beyond Delhi, the CISF will require additional 4,500 personnel to guard the new operations of the mass rapid transport system.




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'In Nepal, some street children are controlled by gangs'

An unwanted child, a street urchin, a knife-wielding gang member and a child labourer — Basu Rai endured the vicissitudes of fate. But after his rescue and rehab, he dedicated his life to saving other street children.




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Climbing Everest, I've proved a tribal girl can do something: Malavath Poorna

At just 13 years, Malavath Poorna from Telangana has become the youngest female climber in the world to scale Mount Everest. Speaking with Rohit E David, Poorna discussed how she has emerged from a family of agricultural labourers to become a mountaineer, the difficulties she faced while navigating Mount Everest, the one thought that kept her going — and how she wants to climb many more mountains now.




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Progress measures must include nature — think beyond GDP: Rachel Kyte

As India debates environmental health versus economic growth, Rachel Kyte, vice-president and special envoy for climate change at the World Bank Group, feels it is vital to think beyond basic GDP.




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There’s no power politics, customer is king, Piyush Goyal says

The responsibility of lighting up the country today rests on Piyush Goyal’s shoulders. Just a month into his new job, the minister for power, coal and renewable energy has set an electric pace to energize the sector.




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Women suffer sanitation absence most — also impacts economy: Bindeshwar Pathak

One month after the horrific Badaun gang rape exposed how gravely at risk women and minors lacking domestic toilets are.




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The BJP-PDP government is a people’s alliance: Mehbooba Mufti

PDP president Mehbooba Mufti is seen as the power behind the new PDP-BJP government in Jammu & Kashmir.




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Indian American Christians condemn assassination of Bhatti

Strongly condemning the assassination of Shahbaz Bhatti, the Federation of Indian Christians Organisations of North America appealed to Islamabad to bring the perpetrators of the "dastardly" crime to justice.




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Hate crime: Two Sikhs attacked in US, one dead

Two elderly Sikhs were shot at by unidentified assailants in Sacramento in US, leaving one dead and the other in critical condition, triggering panic in the neighbourhood having a sizeable Sikh population.




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Indian-American scientists develop alternative to radio tags

A team of Indian-American scientists has developed a smart tracking system, which could very well provide an honourable alternative to the radio tags.




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S African-Indian women get 3-yr jail for fraud

An Indian-origin woman and her mother were sentenced to three years in prison by a South African court, which found them guilty of arranging a fake certificate of marriage to inherit property of their landlord, who died of poisoning.




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Indians safe in Japan, some 30-40 Indians leave for India

The Indians, who were safely brought to a hotel in Tokyo from various rehabilitation centres in Sendai, have left for India.




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Five-year-old Indian becomes millionaire

A five-year-old Indian boy has become a millionaire overnight after winning a lottery at a national bond draw here.




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Denied treatment, woman gives birth on roadside

A woman delivered her child on the roadside after she was allegedly denied treatment by doctors here, police said on Friday. Kiran (35) delivered the baby at around 11 am on the roadside at Katra Bazar in Shikohabad area of the district, they said.




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Cleric asks govt to allow meat sale in Lucknow




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Plea on metro card-address proof linking declined




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62-yr-old becomes 2nd corona fatality in Noida

A 62-year-old man died due to coronavirus in Noida, becoming the second Covid-19 fatality in Uttar Pradesh's Gautam Buddh Nagar district, officials said on Saturday.




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Coronavirus Pandemic: WhatsApp limits forwarding to one chat at a time to curb fake news

WhatsApp is also working directly with NGOs and governments, including the WHO and over 20 national health ministries, to help connect people with accurate information.




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Fact Check: Fake news regarding WhatsApp ticks, govt action on messages being circulated

The fake message was fact-checked by the PIB which said in a tweet that the "Government is doing no such thing."




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Indian researchers start working on genome sequencing of novel coronavirus

In the next 3-4 weeks researchers would be able to get at least 200-300 isolates and this information would help them to make some further conclusion about the behaviour of this virus.




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Apple announces new iPhone SE 2020, to come with minimum 64 GB storage

It has the same iPhone 8 design, but the camera and processor are new.




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Astronomers detect gravitational waves when Black Holes with asymmetric masses collided

The detection of Gravitational-wave in a collision between two black holes of substantially different masses has made astronomers excited.




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NASA's Hubble captures breakup of comet ATLAS into more than two dozen pieces

Hubble identified about 30 fragments on April 20, and 25 pieces on April 23.




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Astronomers discover closest black hole to earth, can be seen with naked eye

The finding was published in the journal Astronomy & Astrophysics.




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PUBG Mobile India Series 2020: Prize money, date of tournament and registration details

The tournament has a Rs 50 lakh prize pool.





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The BEST MOMENTS of Aahana Kumra's Life

"From a very early age, I imagined myself playing powerful characters," she says, and she proves it with her filmography.





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Meet Dia Mirza 2.0

'It broke my heart when Rehnaa Hai Terre Dil Mein did not work at the box office but little did I know that one day, it would become a cult film.'




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When McSher met Thor...

'When I met him, I was a behaving like a 16 year old!''He is incredible, very casual and chilled out.''He told me he would watch Gully Boy and then he said a dialogue from Gully Boy, 'Bahut hard!'.'