A Versatile Route to Unstable Diazo Compounds via Oxadiazolines and their Use in Aryl-Alkyl Cross-Coupling Reactions
作者:Andreas Greb、Jian-Siang Poh、Stephanie Greed、Claudio Battilocchio、Patrick Pasau、David C. Blakemore、Steven V. Ley
DOI:10.1002/anie.201710445
日期:2017.12.22
Coupling of readily available boronicacids and diazo compounds has emerged recently as a powerful metal-free carbon-carbon bond forming method. However, the difficulty in forming the unstable diazo compound partner in a mild fashion has hitherto limited their general use and the scope of the transformation. Here, we report the application of oxadiazolines as precursors for the generation of an unstable
[EN] NICOTINAMIDE DERIVATIVES<br/>[FR] DÉRIVÉS DE NICOTINAMIDE
申请人:PFIZER LTD
公开号:WO2009153721A1
公开(公告)日:2009-12-23
The present invention relates to compounds of the formula (I) and pharmaceutically acceptable salts and solvates thereof, wherein the substituents are defined herein, to compositions containing such compounds and to the uses of such compounds for the treatment of allergic and respiratory conditions.
The present invention relates to compounds of the formula (I) and pharmaceutically acceptable salts and solvates thereof, wherein the substituents are defined herein, to compositions containing such compounds and to the uses of such compounds for the treatment of allergic and respiratory conditions.
Sodium hydrogen telluride: a mechanistic chameleon
作者:Derek H.R. Barton、Luis Bohé、Xavier Lusinchi
DOI:10.1016/s0040-4039(00)96926-0
日期:——
Bisoxazoline-pincer ligated cobalt-catalyzed hydrogenation of alkenes
作者:Mikhaila D. Ritz、Astrid M. Parsons、Philip N. Palermo、William D. Jones
DOI:10.1016/j.poly.2020.114416
日期:2020.4
The efficient and atom economical hydrogenation of alkenes using a novel bisoxazoline ligated cobalt complex has been developed. The hydrogenation of a variety of alkenes containing electron neutral and electron-donating groups proceeds in high yield, while electron-withdrawing and sterically hindered groups are not tolerated. Heterocycles and internal alkenes were also hydrogenated in moderate to high yields. While the catalyst is enantiopure, no enantioinduction was observed suggesting that other factors are involved in achieving enantiocontrol. (C) 2020 Elsevier Ltd. All rights reserved.