Electrochemical Deoxygenative Thiolation of Preactivated Alcohols and Ketones
作者:Feng Zhang、Yang Wang、Yi Wang、Yi Pan
DOI:10.1021/acs.orglett.1c02738
日期:2021.10.1
This work describes an electrochemically promoted nickel-catalyzed deoxygenative thiolation of alcohols and ketones under mild conditions. Excellent substrate tolerance and good chemical yields can be achieved by graphene/nickel foam electrodes in an undivided cell. Further study to gain mechanistic insight into this electrochemical cross-coupling has been carried out.
Synthesis and SAR of New 5-Phenyl-3-ureido-1,5-benzodiazepines as Cholecystokinin-B Receptor Antagonists
作者:Antonella Ursini、Anna M. Capelli、Robin A. E. Carr、Paolo Cassarà、Mauro Corsi、Ornella Curcuruto、Giovanni Curotto、Michele Dal Cin、Silvia Davalli、Daniele Donati、Aldo Feriani、Harry Finch、Gabriella Finizia、Giovanni Gaviraghi、Marc Marien、Giorgio Pentassuglia、Stefano Polinelli、Emiliangelo Ratti、Aldo Reggiani、Giorgio Tarzia、Giovanna Tedesco、Maria E. Tranquillini、David G. Trist、Frank T. M. Van Amsterdam
DOI:10.1021/jm990967h
日期:2000.10.1
A series of 5-phenyl-3-ureidobenzodiazepine-2,4-diones was synthesized and evaluated as cholecystokinin-B (CCK-B) receptorantagonists. Structure-activity relationship (SAR) studies revealed the importance of the N-1 substituent for potent and selective CCK-B affinity. Addition of substituents at the urea side chain provided in some cases more potent compounds. Moreover the introduction of bulky substituents
Visible-light-driven Efficient Photocatalytic Reduction of Organic Azides to Amines over CdS Sheet-rGO Nanocomposite
作者:Krishnadipti Singha、Aniruddha Mondal、Subhash Chandra Ghosh、Asit Baran Panda
DOI:10.1002/asia.201701614
日期:2018.2.2
visible‐light‐induced photocatalytic reduction of aromatic, heteroaromatic, aliphatic and sulfonyl azides to the corresponding amines using hydrazine hydrate as a reductant. The reaction shows excellent conversion and chemoselectivity towards the formation of the amine without self‐photoactivated azo compounds. In the adopted strategy, CdS not only accelerates the formation of nitrene through photoactivation of
Alkenes, arenes, and heteroarenes possessing an 8-quinolylamide group as the directing group are alkylated with primary and secondary alkyl tosylates, mesylate, and halides in the presence of Fe(acac)3/diphosphine as a catalyst and ArZnBr as a base. The reaction proceeds stereospecifically for alkene substrates and takes place without loss of regiochemical integrity of the starting secondary tosylate
Coupling of arylboronic acids with benzyl halides or mesylates without adding transition metal catalysts
作者:Guojiao Wu、Shuai Xu、Yifan Deng、Chaoqiang Wu、Xia Zhao、Wenzhi Ji、Yan Zhang、Jianbo Wang
DOI:10.1016/j.tet.2016.10.031
日期:2016.12
We report herein a transition-metal-free coupling reaction of arylboronic acids with benzyl halides and mesylates for the construction of C(sp2)C(sp3) bonds. A unique feature of this coupling reaction is the formation regioisomers in some cases. Mechanistic studies suggest that this reaction may proceed via an unprecedented Friedel–Crafts-type reactionpathway under base conditions with the assistance