[RhCp*Cl2]2-Catalyzed Directed N-Boc Amidation of Arenes “on Water”
摘要:
Rhodium(III) catalysis on water is effective for directed C-H amidation of arenes. The catalytic process is promoted by OH groups present on the hydrophobic water surface and is inefficient in all (most) common organic solvents investigated so far. In the presence of easily prepared tert-butyl 2,4-dinitrophenoxycarbamate, a new and stable nitrene source, the on water reaction can efficiently provide the desired N-Boc-aminated products with good functional group tolerance.
Reaction of Nitrogen‐Radicals with Organometallics Under Ni‐Catalysis: N‐Arylations and Amino‐Functionalization Cascades
作者:Lucrezia Angelini、Jacob Davies、Marco Simonetti、Laia Malet Sanz、Nadeem S. Sheikh、Daniele Leonori
DOI:10.1002/anie.201900510
日期:2019.4
the generation of nitrogen‐radicals by ground‐state single electron transfer with organyl–NiI species. Depending on the philicity of the N‐radical, two types of processes have been developed. In the case of nucleophilic aminyl radicals direct N‐arylation with aryl organozinc, organoboron, and organosilicon reagents was achieved. In the case of electrophilic amidyl radicals, cascade processes involving
Regioselective Intramolecular Allene Amidation Enabled by an EDA Complex**
作者:Lu Liu、Robert M. Ward、Jennifer M. Schomaker
DOI:10.1002/chem.202002533
日期:2020.11.2
The addition of radicals to unsaturated precursors is a powerful tool for the synthesis of both carbo‐ and heterocyclic organic building blocks. The recent advent of mild ways to generate N‐centered radicals has reignited interest in exploiting highly regio‐, chemo‐, and stereoselective transformations that employ these reactive intermediates. While the additions of aminyl, iminyl, and amidyl radicals
Visible-Light-Mediated Synthesis of Amidyl Radicals: Transition-Metal-Free Hydroamination and <i>N</i>-Arylation Reactions
作者:Jacob Davies、Thomas D. Svejstrup、Daniel Fernandez Reina、Nadeem S. Sheikh、Daniele Leonori
DOI:10.1021/jacs.6b04920
日期:2016.7.6
The development of photoredox reactions of aryloxy-amides for the generation of amidylradicals and their use in hydroamination-cyclization and N-arylation reactions is reported. Owing to the ease of single-electron-transfer reduction of the aryloxy-amides, the organic dye eosin Y was used as the photoredox catalyst, which results in fully transition-metal-free processes. These transformations exhibit
报道了芳氧基-酰胺光氧化还原反应产生酰胺基自由基的发展及其在加氢胺化-环化和 N-芳基化反应中的应用。由于芳氧基酰胺易于单电子转移还原,有机染料伊红 Y 被用作光氧化还原催化剂,这导致完全无过渡金属的过程。这些转变表现出广泛的范围,可以容忍几个重要的功能,并已用于复杂和高价值含氮分子的后期修饰。
SUBSTITUTED HETEROCYCLIC COMPOUNDS AS TROPOMYOSIN RECEPTOR KINASE A (TRKA) INHIBITORS
申请人:Dr. Reddy's Laboratories Ltd.
公开号:US20150005280A1
公开(公告)日:2015-01-01
The present application relates to a series of substituted pyrazolo[1,5-a]pyridine compounds, their use as tropomyosin receptor kinase (Trk) family protein kinase inhibitors, method of making and pharmaceutical compositions comprising such compounds.
Fischer synthesis of isomeric thienopyrrole LHRH antagonists
作者:David M. Andrews、Jean-Claude Arnould、Pascal Boutron、Bénédicte Délouvrie、Christian Delvare、Kevin M. Foote、Annie Hamon、Craig S. Harris、Christine Lambert-van der Brempt、Maryannick Lamorlette、Zbegniew M. Matusiak
DOI:10.1016/j.tet.2009.05.007
日期:2009.7
As part of a structure-activity exploration into LHRH antagonists, structures containing the thieno[2,3b]pyrrole core were identified as potent antagonists. This letter describes the employment of the Fischer synthesis to access this thienopyrrole and isorneric final compounds. (C) 2009 Elsevier Ltd. All rights reserved.