Organocatalytic Decarboxylative Borylation of Cyclopropane <i>N</i>-Hydroxyphthalimide Esters
作者:Yevhen Krokhmaliuk、Ihor Kleban、Yuliya V. Rassukana、Oleksandr O. Grygorenko
DOI:10.1021/acs.joc.3c02247
日期:2024.2.16
A convenient protocol for the two-step organocatalytic decarboxylativeborylation of 1,1-disubstituted, 1,2-disubstituted, and bicyclic cyclopropane carboxylic acids via the corresponding N-hydroxyphthalimideesters is described, using tert-butyl or ethyl isonicotinate as an inexpensive and readily available catalyst. The scope of the method was demonstrated, being limited mainly by electron-poor substrates
METHOD FOR PRODUCING 1-AMINO-1-ALKOXYCARBONYL-2-VINYLCYCLOPROPANE
申请人:API Corporation
公开号:EP2537825A1
公开(公告)日:2012-12-26
It is an object of the present invention to provide a novel method for producing (1R,2S)/(1S,2R)-1-amino-1-alkoxycarbonyl-2-vinylcyclopropane which is useful as a synthetic intermediate of therapeutic agents for hepatitis C and a synthetic intermediate thereof. According to the present invention, when a trans-2-butene derivative having a leaving group at each of the 1- and 4-positions is reacted with a malonic ester in the presence of a base, a specific amount of an alkali metal alkoxide or an alkali metal hydride is used as the base, and further a specific amount of a malonic ester is used to produce a cyclopropane diester, and further, chiral or achiral 1-amino-1-alkoxy-carbonyl-2-vinylcyclopropane and a salt thereof are synthesized using the cyclopropane diester.