trans-2-(Trifluoromethyl)cyclopropylamine was prepared on a multigram scale from readily accessible 4,4,4-trifluorobut-2-enoic acid in five steps. The key step was a high-yielding cyclopropane ring formation from 4,4,4-trifluorobut-2-enoic acid methoxymethyl amide under Corey-Chaykovsky reaction conditions.
N3-CYCLICALLY SUBSTITUTED THIENOURACILS AND USE THEREOF
申请人:Bayer Aktiengesellschaft
公开号:US20200016159A1
公开(公告)日:2020-01-16
The present application relates to novel thieno[2,3-d]pyrimidine-2,4-dione (“thienouracil”) derivatives having cyclic substituents in the 3 position, to processes for the preparation thereof, to the use thereof alone or in combinations for treatment and/or prevention of diseases and to the use thereof for production of medicaments for treatment and/or prevention of diseases, especially for treatment and/or prevention of pulmonary and cardiovascular disorders and of cancer.
作者:Petro P. Onys’ko、Denys V. Klukovsky、Andrii V. Bezdudny、Volodymyr V. Pirozhenko、Yurii M. Pustovit、Anatoly D. Synytsya
DOI:10.1080/10426507.2014.905576
日期:2014.8.3
Abstract A convenient synthetic approach for previously unknown N-(R-cyclopropyl)trifluoroacetimidoyl phosphonates 5a,b (R˭H, CF3) was developed on the basis of the reaction of respective trifluoroacetimidoylchlorides with triethyl phosphite. It was shown that imidoyl phosphonates 5a,b exist as equilibrium mixture of Z/E isomers (Z:E ∼92:8). Activation parameters of Z–E isomerization were evaluated