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Selenium-promoted electrophilic cyclization of arylpropiolamides: synthesis of 3-organoselenyl spiro[4,5]trienones

Org. Biomol. Chem., 2020, Advance Article
DOI: 10.1039/D0OB00609B, Paper
Ana Maria S. Recchi, Pedro H. P. Rosa, Davi F. Back, Gilson Zeni
A synthetic approach to regioselective synthesis of 3-organochalcogenyl spiro[4,5]trienones and 3-organochalcogenyl[4,5]triene-2,6-diones is described through the reaction of arylpropiolamides with an electrophilic chalcogen source.
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The silver catalyzed direct C–H functionalization of quinones with dialkyl amides

Org. Biomol. Chem., 2020, 18,3027-3031
DOI: 10.1039/D0OB00323A, Communication
Sakthivel Pandaram, Adarsh Krishna T. P., Andivelu Ilangovan
A novel and efficient strategy for the direct C–H amidoalkylation of quinones via a radical pathway has been achieved using readily available alkyl amides and an AgNO3-TBHP catalyst system. This is the first ever example of the synthesis of novel amidoquinone derivatives.
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Stereoselective preparation of P,axial-stereogenic allenyl bisphosphine oxides via chirality-transfer

Org. Biomol. Chem., 2020, 18,3017-3021
DOI: 10.1039/D0OB00390E, Communication
Mao-Ran Qiu, Hong-Xing Zheng, Jing-Jing Ye, Bing-Xia Yan, Chang-Qiu Zhao, Qiang Li
Allenyl bisphosphine oxides having variable chirality were prepared in high dr, which was controlled by chiral carbon and phorphorus.
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Regio- and stereoselective synthesis of 1,4-enynes by iron-catalysed Suzuki–Miyaura coupling of propargyl electrophiles under ligand-free conditions

Org. Biomol. Chem., 2020, 18,3022-3026
DOI: 10.1039/D0OB00357C, Communication
Ryosuke Agata, Siming Lu, Hiroshi Matsuda, Katsuhiro Isozaki, Masaharu Nakamura
The first iron-catalysed cross coupling of propargyl electrophiles with lithium alkenylborates has been developed.
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Metal-free cascade reactions of aziridines with arylalkynes and aryldiazoniums: facile access to arylazopyrrolines

Org. Biomol. Chem., 2020, 18,3149-3157
DOI: 10.1039/D0OB00346H, Paper
Jing Rong, Hao Jiang, Sijing Wang, Zhenni Su, Huiyan Wang, Chuanzhou Tao
A novel and facile approach to synthesize arylazopyrroline scaffolds via metal-free cascade reactions of aziridines with arylalkynes and aryldiazoniums has been developed, providing access to a variety of 4-arylazo-2-pyrrolines in a highly concise fashion.
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Rh(III)-Catalyzed regioselective C4 alkylation of indoles with allylic alcohols: direct access to β-indolyl ketones

Org. Biomol. Chem., 2020, 18,3038-3042
DOI: 10.1039/D0OB00396D, Communication
Changduo Pan, Gao Huang, Yujia Shan, Yiting Li, Jin-Tao Yu
A Rh(III)-catalyzed direct C4 alkylation of indoles with allylic alcohols to access β-indolyl ketones was developed.
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Enantioselective synthesis of chiral α-alkynylated thiazolidones by tandem S-addition/acetalization of alkynyl imines

Org. Biomol. Chem., 2020, 18,3117-3124
DOI: 10.1039/D0OB00365D, Paper
Mei-Xin Wang, Juan Liu, Zhen Liu, Yingcheng Wang, Qi-Qiong Yang, Wenyu Shan, Yu-Hua Deng, Zhihui Shao
A SPINOL-CPA catalyzed asymmetric [2 + 3]-annulation of in situ generated alkynyl imines and 1,4-dithiane-2,5-diol has been developed to afford enantiopure α-alkynylated thiazolidones.
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Pseudo-enantiomeric carbohydrate-based N-heterocyclic carbenes as promising chiral ligands for enantiotopic discrimination

Org. Biomol. Chem., 2020, 18,3012-3016
DOI: 10.1039/D0OB00155D, Communication
Alexander S. Henderson, John F. Bower, M. Carmen Galan
The practical synthesis of pseudo-enantiomeric carbohydrate-based NHC–Rh complexes bearing C1 or C3 sterically differentiated positions is reported. We show that steric bulk at either C1 or C3 leads to enantiotopic discrimination in the hydrosilylation of acetophenone.
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Synthesis of disaccharide modified berberine derivatives and their anti-diabetic investigation in zebrafish using a fluorescence-based technology

Org. Biomol. Chem., 2020, Advance Article
DOI: 10.1039/D0OB00327A, Paper
Lizhen Wang, Haotian Kong, Meng Jin, Xiaobin Li, Rostyslav Stoika, Houwen Lin, Kechun Liu
Diglucose modified berberine derivatives can dramatically promote the uptake of 2-NBDG in both zebrafish larvae and their eyes.
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Electrochemical synthesis of selenyl-dihydrofurans via anodic selenofunctionalization of allyl-naphthol/phenol derivatives and their anti-Alzheimer activity

Org. Biomol. Chem., 2020, Advance Article
DOI: 10.1039/D0OB00629G, Communication
Marcos R. Scheide, Alex R. Schneider, Guilherme A. M. Jardim, Guilherme M. Martins, Daniele C. Durigon, Sumbal Saba, Jamal Rafique, Antonio L. Braga
Herein, we report an eco-friendly, electrosynthetic approach for the intramolecular oxyselenylation of allyl-naphthol/phenol derivatives.
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Preparation of cage-shaped hexakis(spiroborate)s

Org. Biomol. Chem., 2020, Advance Article
DOI: 10.1039/D0OB00518E, Paper
Hiroshi Danjo, Yuhki Masuda, Yuki Kidena, Masatoshi Kawahata, Kazuaki Ohara, Kentaro Yamaguchi
Direct construction of anionic hexakis(spiroborate) prismatic cages was realized by the reaction of hexahydroxytriphenylene, bis(dihydroxynaphthalene)s, and boric acid.
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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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Enantioselective Synthesis of Indanone Spiro-Isochromanone Derivatives via Dinuclear Zinc-Catalyzed Michael/Transesterification Tandem Reaction

Org. Biomol. Chem., 2020, Accepted Manuscript
DOI: 10.1039/D0OB00541J, Paper
Xiao-Chao Yang, Meng Xu, Jin-Bao Wang, Meng-Meng Liu, Francois Mathey, Yuan-Zhao Hua, Mincan Wang
An enantioselective Michael/transesterification tandem reaction of α-hydroxy indanones with ortho-ester chalcones was realized by dinuclear zinc catalysts. A series of enantiomerically pure spiro[indanone-2,3’-isochromane-1-one] derivatives were obtained in good yields with...
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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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Direct recognition and sensitive detection of circular RNA with ligation-based PCR

Org. Biomol. Chem., 2020, 18,3269-3273
DOI: 10.1039/D0OB00625D, Communication
Pengbo Zhang, Na Guo, Kejian Gao, Fengxia Su, Fangfang Wang, Zhengping Li
A sensitive and specific method for circRNA detection is developed through the direct ligation of two ingeniously designed DNA probes.
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Copper-catalyzed direct amination of benzylic hydrocarbons and inactive aliphatic alkanes with arylamines

Org. Biomol. Chem., 2020, 18,3263-3268
DOI: 10.1039/D0OB00491J, Communication
Hua Yao, Bo Xie, Xiaoyang Zhong, Shengzhou Jin, Sen Lin, Zhaohua Yan
A new synthetic method toward direct C–N bond formation through saturated C–H amination of benzylic hydrocarbons and inactive aliphatic alkanes with primary aromatic amines under an inexpensive catalyst/oxidant (Cu/DTBP) system has been developed.
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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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Late-stage synthesis and application of photoreactive probes derived from direct benzoylation of heteroaromatic C–H bonds

Org. Biomol. Chem., 2020, Advance Article
DOI: 10.1039/D0OB00336K, Communication
Kevin D. Hesp, Jun Xiao, Graham M. West
A synthetically-driven, late-stage C–H benzoylation strategy for the expedited preparation and evaluation of heterocyclic alternatives to more classical benzophenone photoreactive probes is reported.
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Spiroconyone A, a new phytosterol with a spiro [5,6] ring system from Conyza japonica

Org. Biomol. Chem., 2020, Advance Article
DOI: 10.1039/D0OB00666A, Paper
Long-Gao Xiao, Yu Zhang, Hong-Li Zhang, Ding Li, Qiong Gu, Gui-Hua Tang, Qian Yu, Lin-Kun An
The first rearranged phytosterol (spiroconyone A) with an unusual spiro [5,6] ring system and two new TDP1 inhibitors 7 and 10 showing a strong synergistic effect with topotecan were isolated from Conyza japonica.
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Fire arm, opening an eatery: get licence application forms online

Now, getting a licence for a fire-arm or operating an eatery will be easy with Delhi Police on Tuesday launching a dedicated website for its Licencing Branch.




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Aspiring actor-cum-model arrested for killing IT professional

A 20-year-old aspiring actor- cum-model was arrested in the national capital for allegedly murdering a young woman IT professional a week ago after she refused to heed to his demand for money.




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Delhi: 2 schools closed after students test positive for H1N1 virus

Two city schools have been closed for a week from Monday after a student each from the educational institution tested positive for swine flu.




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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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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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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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Hindu guru convicted of molesting girls in US

An octogenarian Hindu religious leader, head of a Hindu ashram, one of the largest temples in the US, has been convicted of molesting two young girls.




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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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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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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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Lucknow: Spurned by beau, woman sets self afire




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Prayagraj: Two teenage girls drown in Ganga




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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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Man who died of cardiorespiratory arrest tests +ve




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Coronavirus: Citing privacy concerns, New York City bans schools from using Zoom amid lockdown

The ban comes right after the video conferencing service company started receiving a lot of criticism for poor security policies and privacy practices from it users.




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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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USGS releases first comprehensive geological map of moon using Apollo data

The new map explains the 4.5-billion-year-old history of our neighbour in space.




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COVID-19 gene detected in air pollutants: Study

The study was led by led by Leonardo Setti of the University of Bologna in Italy.





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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 be a badass girl'

'If I look in a certain way, have an innocent face, I will only get offers for the girl-next-door roles. As an actor and creative person, you want to explore and experiment more but you don't get the opportunity. That gets frustrating at times.'




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'I can't imagine how A-list actors manage their lives'

'Sometimes, I wish someone would tell me that this will happen at this point in time, so I know how my life will be. I don't know what my evening is like. I don't know what my tomorrow will be like. The uncertainty sometimes takes a toll on me.'




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'We've not tried to make a Virat or a Dhoni'

'I am not here to change the society, and I am not under the delusion that a film can change things around. The idea is to have fun and give your point of view.'





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'Sky Is Pink required big stars'

'There is never a safe choice in the movie business.''Everything is chance.'





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'Most of my films are ahead of their time'

'Everyone thought I was a good-looking boy with chocolate hero looks, and was offered such roles only. I was so depressed when people said that a singer's son cannot be an actor; that he should be a singer. I needed a film to showcase my talent.'