Acylative Desymmetrization of Cyclic <i>meso</i>-1,3-Diols by Chiral DMAP Derivatives
作者:Hiroki Mandai、Tsubasa Hironaka、Koichi Mitsudo、Seiji Suga
DOI:10.1246/cl.200809
日期:2021.3.5
An efficient enantioselective acylative desymmetrization of cyclic meso-1,3-diols was developed by using a chiral DMAP derivative 1e having a 1,1′-binaphthyl unit. The reactions required only 0.5 m...
This application relates to the use as thrombin inhibitors, coagulation inhibitors and thromboembolic disorder agents of diamines of formula I as defined herein. It also provides novel compounds of formula I, processes and intermediates for their preparation, and pharmaceutical formulations comprising the novel compounds of formula I.
[EN] SYNTHESIS OF MORPHINE AND RELATED DERIVATIVES<br/>[FR] SYNTHÈSE DE LA MORPHINE ET DE DÉRIVÉS ASSOCIÉS
申请人:UNIV TEXAS
公开号:WO2010132570A1
公开(公告)日:2010-11-18
The present invention relates to methods for the synthesis of galanthamine, morphine, intermediates, salts and derivatives thereof, wherein the starting compound is biphenyl.
本发明涉及一种合成迷迭香碱、吗啡、中间体、盐和衍生物的方法,其中起始化合物为联苯。
Iron-Catalyzed Difluoromethylation of Arylzincs with Difluoromethyl 2-Pyridyl Sulfone
作者:Wenjun Miao、Yanchuan Zhao、Chuanfa Ni、Bing Gao、Wei Zhang、Jinbo Hu
DOI:10.1021/jacs.7b11976
日期:2018.1.24
We report the first iron-catalyzed difluoromethylation of arylzincs with difluoromethyl2-pyridylsulfone via selective C-S bond cleavage. This method employs the readily available, bench-stable fluoroalkyl sulfone reagent and inexpensive iron catalyst, allowing facile access to structurally diverse difluoromethylated arenes at low temperatures. The experiment employing a radical clock indicates the
Pump it up! The sluggish reactivity of organozinc reagents in additions to aldehydes, ketones, and CO2 can be increased by MgCl2, which is usually generated in the preparation of the zinc reagent. The direct reaction with CO2, in particular, opens an expeditious route to phenylacetic acid derivatives, as demonstrated in a short synthesis of ibuprofen (see scheme).