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Highly Z-selective synthesis of 1,3-oxathiol-2-ylidenes and 4-methylene-oxazolidine-2-thiones via atom-specific 5-exo-dig cyclization of propargyl alcohol with isothiocyanate

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Org. Biomol. Chem., 2020, Advance Article
DOI: 10.1039/D0OB00083C, Paper
S. Antony Savarimuthu, D. G. Leo Prakash, S. Augustine Thomas, Thirumanavelan Gandhi, Mrinal K. Bera
The Z-selectivity observed in imine and alkene motifs after 5-exo-dig cyclization of propargyl alcohol and isothiocyanate is rare in the literature and this selectivity can be attributed to electronic and steric factors of the imine and alkene motif respectively.
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Regioselective hydroarylation and arylation of maleimides with indazoles via a Rh(III)-catalyzed C–H activation

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Org. Biomol. Chem., 2020, 18,3093-3097
DOI: 10.1039/D0OB00353K, Paper
Asim Kumar Ghosh, Sadhanendu Samanta, Payel Ghosh, Sukanya Neogi, Alakananda Hajra
Switchable Rh(III)-catalyzed highly regioselective hydroarylation and oxidative arylation of maleimides with 2-arylindazoles via C–H activation have been demonstrated.
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Sub-stoichiometric reductive etherification of carbohydrate substrates and one-pot protecting group manipulation

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Org. Biomol. Chem., 2020, 18,3135-3141
DOI: 10.1039/D0OB00252F, Paper
Chiao Wen Chen, Ching Chi Wang, Xin Ru Li, Henryk Witek, Kwok-Kong Tony Mong
Polymethylhydrosiloxane (PMHS): a sub-stoichiometric reducing agent for reductive etherification of carbohydrate substrates and its application for one-pot protecting group manipulation
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Pseudo-enantiomeric carbohydrate-based N-heterocyclic carbenes as promising chiral ligands for enantiotopic discrimination

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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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Copper-catalyzed diastereoselective hydrothioetherification of oxa(aza)benzonorbornadienes

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Org. Biomol. Chem., 2020, Advance Article
DOI: 10.1039/D0OB00659A, Paper
Qifu Lin, Yongqi Yao, Wen Yang, Yun Tan, Shuqi Chen, Donghan Chen, Dingqiao Yang
A novel copper-catalyzed multicomponent one-pot syn-selective hydrothioetherification of oxa(aza)bicyclic alkenes to synthesize unsymmetrical thioethers has been established.
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Electrochemical synthesis of selenyl-dihydrofurans via anodic selenofunctionalization of allyl-naphthol/phenol derivatives and their anti-Alzheimer activity

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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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N-Hydroxy peptides: solid-phase synthesis and β-sheet propensity

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Org. Biomol. Chem., 2020, Advance Article
DOI: 10.1039/D0OB00664E, Paper
Matthew P. Sarnowski, Juan R. Del Valle
Backbone amide hydroxylation of peptide strands enhances β-hairpin folding.
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Acylation of oxindoles using methyl/phenyl esters via mixed Claisen condensation – An access to 3-alkylideneoxindoles

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Org. Biomol. Chem., 2020, Accepted Manuscript
DOI: 10.1039/D0OB00789G, Communication
Ramdas Sreedharan, Purushothaman Rajeshwaran, Pradeep Kumar Reddy Panyam, Saurabh Yadav, C. M. Nagaraja, THIRUMANAVELAN GANDHI
Predominantly, aggressive acid chlorides and stoichiometric coupling reagents are employed in the acylating process for synthesizing carbonyl tethered heterocycles. Herein, we report simple acyl sources, viz. methyl and phenyl esters...
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Heterologous expression of the trichostatin gene cluster and functional characterization of N-methyltransferase TsnB8

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Org. Biomol. Chem., 2020, Advance Article
DOI: 10.1039/D0OB00617C, Communication
Wei Liu, Vinay Gopal Jannu, Zhiwen Liu, Qingbo Zhang, Xiaodong Jiang, Liang Ma, Wenjun Zhang, Changsheng Zhang, Yiguang Zhu
N-Methyltransferase TsnB8 was demonstrated to catalyze successive methyltransfer reactions in the biosynthesis of trichostatin.
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Rhodium-Catalyzed ortho-Acrylation of Aryl Ketone O-Methyl Oximes with Cyclopropenones

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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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Synthesis of unsymmetrical benzils via palladium-catalysed α-arylation–oxidation of 2-hydroxyacetophenones with aryl bromides

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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

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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

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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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Origin of the ligand effect in the cobalt catalyzed regioselective hydroboration of 1,3-diene

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Org. Biomol. Chem., 2020, Advance Article
DOI: 10.1039/D0OB00628A, Paper
Yuhua Liu, ZhongJie Jiang, Jipei Chen
The detailed mechanism and the origin of the ligand-controlled regioselectivity in the cobalt catalyzed hydroboration of 2-substituted 1,3-diene have been investigated.
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Synthesis and photophysical properties of selenopheno[2,3-b]quinoxaline and selenopheno[2,3-b]pyrazine heteroacenes

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Org. Biomol. Chem., 2020, Accepted Manuscript
DOI: 10.1039/D0OB00718H, Paper
Amol Sonawane, Atsushi Shimozuma, Taro Udagawa, Masayuki Ninomiya, Mamoru Koketsu
In this paper, we report the novel synthesis of three different heterocycles namely 2-arylselenopheno[2,3-b]quinoxaline, 3-(aryl/alkylselanyl)-2-arylselenopheno[2,3-b]quinoxaline and 6-phenyl-7-(arylselanyl)selenopheno[2,3-b]pyrazine derivatives from the corresponding 2,3-dichloroquinoxaline and 2,3-dichloropyrazine derivatives. Further, photophysical properties were investigated...
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Targeting STAT3 anti-apoptosis pathways with organic and hybrid organic–inorganic inhibitors

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Org. Biomol. Chem., 2020, 18,3288-3296
DOI: 10.1039/C9OB02682G, Paper
Matthew B. Minus, Haopei Wang, Jaime O. Munoz, Alexandra M. Stevens, Alicia E. Mangubat-Medina, Michael J. Krueger, Wei Liu, Moses M. Kasembeli, Julian C. Cooper, Mikhail I. Kolosov, David J. Tweardy, Michele S. Redell, Zachary T. Ball
Recurrence and drug resistance are major challenges in the treatment of acute myeloid leukemia (AML) that spur efforts to identify new clinical targets and active agents.
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Synthesis, structures and photophysical properties of hexacoordinated organosilicon compounds with 2-(2-pyridyl)phenyl groups

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Org. Biomol. Chem., 2020, 18,3239-3242
DOI: 10.1039/D0OB00484G, Communication
Shohei Furuta, Toshiaki Mori, Yusuke Yoshigoe, Kohei Sekine, Yoichiro Kuninobu
We synthesised novel air-, water-, heat-, acid-, and base-stable hexacoordinated organosilicon compounds, which contain two C,N-bidentate ligands and form two silafluorene equivalent moieties, with Lewis acid–base interactions.
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Synthetic pathways to tetrahydrocannabinol (THC): an overview

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Org. Biomol. Chem., 2020, 18,3203-3215
DOI: 10.1039/D0OB00464B, Review Article
Open Access
Victor R. L. J. Bloemendal, Jan C. M. van Hest, Floris P. J. T. Rutjes
This review summarises various synthetic pathways leading to tetrahydrocannabinol and structurally related cannabinoids.
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Synthesis of methylene cyclopropane-fused chromenes and dihydroquinolines by sequential [4 + 2]- and [1 + 2]-annulation

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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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Copper-catalyzed direct amination of benzylic hydrocarbons and inactive aliphatic alkanes with arylamines

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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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Synthesis of α-CF3-substituted E-dehydroornithine derivatives via copper(I)-catalyzed hydroamination of allenes

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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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KI/TBHP-promoted [3 + 2] cycloaddition of pyrrolo[1,2-a]quinoxalines and N-arylsulfonylhydrazones

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Org. Biomol. Chem., 2020, 18,3360-3366
DOI: 10.1039/D0OB00494D, Paper
Zhen Yang, Jing He, Yueting Wei, Weiwei Li, Ping Liu
A series of diverse fused [1,2,4]triazolo[3,4-c]quinoxalines was obtained by an efficient KI/TBHP-promoted [3 + 2] cycloaddition of pyrrolo[1,2-a]quinoxalines and N-arylsulfonylhydrazones.
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O-Cyclopropyl hydroxylamines: gram-scale synthesis and utility as precursors for N-heterocycles

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Org. Biomol. Chem., 2020, 18,3281-3287
DOI: 10.1039/D0OB00611D, Paper
Kaitlyn Lovato, Urmibhusan Bhakta, Yi Pin Ng, László Kürti
A novel and scalable synthesis of O-cyclopropyl hydroxylamines is reported. These compounds are bench-stable and have been shown to be practical precursors for the synthesis of N-heterocycles via a di-heteroatom [3,3]-sigmatropic rearrangement.
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Spiroconyone A, a new phytosterol with a spiro [5,6] ring system from Conyza japonica

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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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Synthesis of gem-difluoroalkenes via nickel-catalyzed allylic defluorinative reductive cross-coupling of trifluoromethyl alkenes with epoxides

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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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Why Ayushmann is not interested in Rs 200 crores

By www.rediff.com
Published On :: Wed, 12 Jun 2019 09:49:55 +0530

'I can do slice-of-life kind of films anytime; But playing a cop is different. It's difficult to maintain that intensity on screen. That's where the real acting comes in place.'


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'People don't feel shy talking about sex now'

By www.rediff.com
Published On :: Wed, 23 Oct 2019 15:31:22 +0530

'But you have to keep in mind the entertainment value. It can't be preachy.'


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Why Stree/Bala director makes movies in a jiffy

By www.rediff.com
Published On :: Tue, 19 Nov 2019 10:41:50 +0530

'I am making movies in a jiffy because I want to work with everyone.'


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Why Ajay Devgn didn't make a film on Shivaji

By www.rediff.com
Published On :: Wed, 08 Jan 2020 15:14:12 +0530

'I have started a series called Unsung Warriors.''This time, the film is about Tanhaji. The next film will be on someone from Rajasthan or maybe Punjab.''I don't want to pick a warrior that everyone knows about.'


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Why Zareen Khan is playing a lesbian

By www.rediff.com
Published On :: Tue, 28 Jan 2020 12:27:04 +0530

'A lot of people struggle to become a part of this industry, but I was lucky that I did not have to really struggle.''My struggle started after becoming a part of this industry, and, Oh my God, the struggle!'


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Why this hunk scares Bollywood stars

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Published On :: Wed, 22 Apr 2020 13:06:27 +0530

'A very big film director had said yes to me for two-three films.''When daddy got to know I am going to be opposite the main guy, he got cold feet.''They don't want their investments to get sabotaged by somebody like me who can overshine their son.'


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Blog: Why we are so charmed by Tharoor’s English

By blogs.timesofindia.indiatimes.com
Published On :: Sun, 11 Feb 2018 10:42:39 IST


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Why reality shows are no child's play

By timesofindia.indiatimes.com
Published On :: Sun, 25 Feb 2018 01:00:00 IST

L'affaire Papon reveals the dark underbelly of talent hunts on TV


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Blog: Why I gave up chocolate

By timesofindia.indiatimes.com
Published On :: Sun, 10 Feb 2019 12:15:29 IST


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Why this Pakistani is getting ‘likes’ from India

By timesofindia.indiatimes.com
Published On :: Sun, 07 Apr 2019 02:00:00 IST


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Thermal stresses and temperature control of mass concrete / Zhu Bofang, China Institute of Water Resources and Hydropower Research, and Chinese Academy of Engineering

By library.mit.edu
Published On :: Sun, 7 Feb 2016 06:11:21 EST

Barker Library - TA440.Z485 2014


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Advances in cement analysis and concrete petrography / editors, Derek Cong and Don Broton

By library.mit.edu
Published On :: Sun, 23 Feb 2020 06:28:52 EST

Barker Library - TA435.A36 2019


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Integrative structural biology with hybrid methods / editors, Haruki Nakamura, Gerard Kleywegt, Stephen K. Burley and John L. Markley

By library.mit.edu
Published On :: Sun, 17 Feb 2019 13:12:16 EST

Online Resource


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Biochemical and biophysical roles of cell surface molecules / Kausik Chattopadhyay, Subhash C. Basu, editor

By library.mit.edu
Published On :: Sun, 17 Feb 2019 13:12:16 EST

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