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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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A domino annulation approach to 3,4-diacylpyrrolo[1,2-a]pyrazines: decoration of pyrazine units

Org. Biomol. Chem., 2020, 18,3324-3333
DOI: 10.1039/D0OB00444H, Paper
Anuradha Dagar, Yohan Seo, Wan Namkung, Ikyon Kim
A new one-pot, sequential three-component access to 3,4-diacylpyrrolo[1,2-a]pyrazine was achieved from the reaction of an α-haloketone, azide, and N-substituted pyrrole-2-carboxaldehyde under mild reaction conditions.
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Modular synthesis of oligoacetylacetones via site-selective silylation of acetylacetone derivatives

Org. Biomol. Chem., 2020, 18,3297-3302
DOI: 10.1039/D0OB00501K, Paper
Parantap Sarkar, Yuya Inaba, Hayato Shirakura, Tomoki Yoneda, Yasuhide Inokuma
Aliphatic oligoketones with tailored carbonyl and substituent sequences were modularly synthesized utilizing site-selective formation of enol silyl ethers. Their unique conformational preferences in solid-state were revealed by X-ray crystallography.
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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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Synthesis of α-CF3-substituted E-dehydroornithine derivatives via copper(I)-catalyzed hydroamination of allenes

Org. Biomol. Chem., 2020, 18,3274-3280
DOI: 10.1039/D0OB00580K, Paper
Anna N. Philippova, Daria V. Vorobyeva, Florian Monnier, Sergey N. Osipov
Novel α-CF3-substituted E-dehydroornithine derivatives have been synthesized via the Cu(I)-catalyzed hydroamination of α-CF3-α-allenyl-α-aminocarboxylates/phosphonates with different amines.
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Dipyrazolodioxadiazocines as shelf-stable “ready-to-use” precursors for an in situ generation of enolate-iminium 1,4-dipoles: a straightforward atom-economical approach to pyrazolo[5,1-d][1,3,5]dioxazines

Org. Biomol. Chem., 2020, 18,3382-3391
DOI: 10.1039/D0OB00451K, Paper
Vladimir E. Zhulanov, Valeria A. Vigovskaya, Maksim V. Dmitriev, Pavel S. Silaichev, Andrey N. Maslivets, Michael Rubin
Generation of cyclic enolate-iminium 1,4-dipoles via thermolysis of dipyrazolodioxadiazocines in the presence of ketones allowed for efficient preparation of pyrazolo[5,1-d][1,3,5]dioxazines.
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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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Correction: Nickel-catalyzed cyanation of phenol derivatives activated by 2,4,6-trichloro-1,3,5-triazine

Org. Biomol. Chem., 2020, Advance Article
DOI: 10.1039/D0OB90052D, Correction
Open Access
  This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
Liang Wang, Yaoyao Wang, Jun Shen, Qun Chen, Ming-Yang He
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People look at fairy tales in a limited way: Hudson Asia MD Tulika Tripathi

Tulika Tripathi is the managing director of a global talents solutions company, Hudson Asia.




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We’ll look back at 2014 as a new journey for India-Israel ties: Alon Ushpiz

India and Israel have signed a far-reaching agreement on homeland security where the two countries will collaborate on policing, forensics, counter-terrorism, etc. Israel's ambassador Alon Ushpiz spoke with Indrani Bagchi about shared concerns, PM Modi — and justice in the 2012 attack on an Israeli diplomat:




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Pak politicians want to resolve Kashmir — military won't allow this: Arif Jamal

Arif Jamal is a Pakistani journalist and South Asia expert based in America.




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Upgraded fleet in India by 2016, Air France-KLM CEO says

Alexandre de Juniac, chairman and CEO of Air France-KLM, which on June 24 launched a €500 million aircraft upgrade project called BEST AND BEYOND with the inaugural flight of an advanced Boeing 777 on the Paris-New York route, says flyers from India can look forward to top-of-the-line seats by the end of 2016.




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Australia-India cricket rivalry has even bettered Ashes: John Harnden

CEO of the ICC World Cup 2015 John Harnden spoke with Amin Ali about ensuring excitement in cricket's mega-tournament, clamping down on racism, managing 'minnows' matches — and how Australia is sizing up India as a rival for the trophy.




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Officials to pay for illegal building: Venkaiah Naidu

The Centre will push for key reforms including the provision of incentivising civic agencies for good work & making officials concerned accountable for illegal construction or unauthorized development under their jurisdiction.




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India needn't follow West's energy model — have a new path: ​Sam Tranum

There's a fundamental mismatch between India's energy resources and the needs of its people and companies for energy.




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A strong and vibrant India is important for peace and stability in Asia: K Shanmugam, Singapore's foreign minister

Singapore is one of India's closest partners in Asia. In his first visit to meet PM Narendra Modi after the formation of the NDA government, K Shanmugam, Singapore's foreign minister, tells Indrani Bagchi they would build some of India's new smart cities and involve themselves in skill development programmes in India.




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Swiss accounts are a diversion. Bulk of black money is right here in India

The scent of 'black money' is in the air again. At the Supreme Court's order, Modi sarkar has set up a Special Investigation Team to look into cases of illegal outflow of money to foreign havens.




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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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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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Indian girl raped, murdered and stuffed inside suitcase in Australia

24-year-old Tosha Thakkar was last seen alive on March 9 in Sydney. Her alleged attacker, Daniel Stani-Reginald, has been denied bail.




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Indian-origin model accuses Aus modelling agency of racism

According to a report in the local daily, Kema Rajandran was told by a Parth-based modelling agency that her work chances were "limited" in the country because she was not Caucasian.




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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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Indian dentists caught in UK red tape

Several dentists from India and other non-EU countries have been caught in bureaucratic wrangles between professional governing bodies in Britain, a leading migrants campaign group said today.




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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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Australia's Victoria police inducts first turban wearing Sikh

Police in Australia's Victoria state today inducted its first officer from Sikh community who will wear a newly designed police turban, a media report said today.




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US housing society to pay $110,000 for keeping Indians out

A Seattle-based housing society will pay over $110,000 to settle a lawsuit that alleged the society discriminated against Indians and African-Americans seeking to rent apartments in the complex.




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Indian-origin Canadian gets life term for killing wife

A Canadian court has sentenced an Indian-origin man to life in prison for murdering his pregnant wife in 2006.




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Indians in Singapore produce movie

A group of Indian professionals in Singapore has produced a film, 'Mausams', which captures the tensed personal moments and challenges of working a city.




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Indian connection to prince William and Kate Middleton's wedding cake

Had it not been for the encouragement of her Gujarati husband Kishore Patel, Fiona Cairns may have never made the leap from graphic design to luxury baking.




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Indian teachers in demand in Singapore

Indian teachers are most sought after in Singapore schools with increasing number of teachers being recruited to teach not only Indian languages but also other subjects.




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Delhi air loses out to partial freedom

The average PM2.5 concentration in the city fell by around 31% and NO2 levels by 33% in the month-long full lockdown period between March 24 and April 25, data analysed by System of Air Quality and Weather Forecasting and Research (SAFAR) shows.




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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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Google and Apple partner up to defeat COVID-19 outbreak, tech giants to jointly develop technology for contact tracing

The multinational companies, which hold the largest market shares in the sphere of technology, have decided to put their joint efforts in developing technology that will help world governments to cut the spread of the virus and save lives




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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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Xiaomi launches Mi Box 4K streaming device in India, here's are the features, price

With the Mi Box 4K, Xiaomi is venturing into a segment dominated by Amazon with its Fire TV Stick.




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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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'I can't believe there are two Constitutions in India'

'India is called the largest democracy in the world, and one cannot believe that there are two Constitutions, two penal codes and two sets of laws.'




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'Big Boss is destroying India'

'Salman Khan should be booked under the National Security Act as he is destroying Indian culture.'







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'I am going pan India'

'When films resonate with the audience, it gives you the confidence to take more risks.'




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'Love triangles never go out of fashion'

'Relationships have changed so dynamically that the 'woh' doesn't have to be a person.'