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
Fluoroalkyl-Substituted Cyclopropane Derivatives: Synthesis and Physicochemical Properties
作者:Anton V. Chernykh、Oleksandr S. Olifir、Yuliya O. Kuchkovska、Dmitriy M. Volochnyuk、Vladimir S. Yarmolchuk、Oleksandr O. Grygorenko
DOI:10.1021/acs.joc.0c01848
日期:2020.10.2
for the obtained compounds or their derivatives to evaluate the influence of the type and relative position of fluoroalkyl substituents on the acidity and lipophilicity of monofunctionalized cyclopropanes. An analysis of the selected products by X-ray crystallography was carried out to obtain a better insight into the observed differences in physicochemicalproperties.
用不同的方法以克数级合成了一系列带有CH 2 F,CHF 2和CF 3取代基的全部12种顺式和反式环丙烷羧酸和环丙胺。测量获得的化合物或其衍生物的解离常数(p K a)和log P值,以评估氟代烷基取代基的类型和相对位置对单官能化环丙烷的酸度和亲脂性的影响。通过X射线晶体学对所选产品进行了分析,以更好地了解所观察到的理化性质差异。
Multigram Synthesis of trans-2-(Trifluoromethyl)cyclopropanamine
2-(Trifluoromethyl)cyclopropanamine was synthesized. The key step of the synthesis is a transformation of the carboxy group into the trifluoromethyl group by using sulfur tetrafluoride. Twenty gram of the target product was conveniently prepared in a single batch. fluorine - trifluoromethyl group - amines - cyclopropyl group - sulfur tetrafluoride