C-benzylation of various sodium enolates derived frommethyl malonate, beta-ketoesters, a beta-cyanoester, a beta-cyanosulfone, ketones and a carboxylic ester is reported. Reaction of alkoxydiphenylsulfonium salts formed by treating various benzyl alcohols with diphenyl sulfide bis(trifluoromethanesulfonate) (derived from trifluoromethanesulfonic anhydride and diphenyl sulfoxide) proceeded smoothly, and
A facile one-pot C-benzylation of various sodium enolates derived from methyl malonate, beta-ketoesters, a beta-cyanoester, a beta-cyanosulfone, ketones and a carboxylic ester is reported. Reaction of alkoxydiphenylsulfonium salts formed by treating various benzyl alcohols with diphenyl sulfide bis(trifluoromethanesulfonate) (derived from trifluoromethanesulfonic anhydride and diphenyl sulfoxide) proceeded
Arylaminoaryl-alkyl-substituted imidazolidine-2,4-diones, process for preparing them, medicaments comprising these compounds, and their use
申请人:JAEHNE Gerhard
公开号:US20090215728A1
公开(公告)日:2009-08-27
This invention relates to arylaminoaryl-alkyl-substituted imidazolidone-2,4-diones of formula (I) and also to their physiologically tolerated salts:
Wherein R, R′, R1 to R10, A, D, E, G, L and p are as defined herein. The invention also relates to processes for preparing them, pharmaceutical compositions comprising them and their therapeutic use. The compounds are suitable, for example, as anti-obesity drugs and for treating cardiometabolic syndrome.
Reductive Knoevenagel Condensation with the Zn–AcOH System
作者:Ekaterina M. Budynina、Konstantin L. Ivanov、Mikhail Ya. Melnikov
DOI:10.1055/s-0040-1705940
日期:2021.4
gram-scale one-pot approach to 2-substituted malonates and related structures is developed, starting from commercially available aldehydes and active methylene compounds. The technique combines Knoevenagelcondensation with the reduction of the C=C bond in the resulting activated alkenes with the Zn–AcOH system. The relative ease with which the C=C bond reduction occurs can be traced to the accepting abilities
Palladium catalyzed direct benzylation/allylation of malonates with alcohols – in situ C–O bond activation
作者:Xueqin Cao、Yugen Zhang
DOI:10.1039/c6gc00163g
日期:——
High step- and atomic-economy are the endless pursuit in organic and pharmaceutical synthesis. Herein, a new method for directly coupling of benzyl/allylalcohols with malonates via palladium catalyzed Tsuji-Trost type...