Enantioselective Cyclopropanation of 2‐Cyano‐3‐arylacrylates Using Carbohydrate‐Based Crown Ethers
作者:István Orbán、Bertalan Varga、Péter Bagi、Tamás Holczbauer、Zsolt Rapi
DOI:10.1002/ejoc.202200112
日期:2022.4.12
substituted cyclopropane derivatives have been synthesized by the reaction of unsaturated cyanoacrylates with diethyl bromomalonate in the presence of carbohydrate-based crown ethers under mild phase transfer catalytic conditions. The solvent and the aromatic moiety affected the enantioselecivity, and a correlation has been found between the asymmetric induction and the position of the substituents on
已通过不饱和氰基丙烯酸酯与溴丙二酸二乙酯在基于碳水化合物的冠醚存在下在温和的相转移催化条件下反应合成了对映体富集的高度取代的环丙烷衍生物。溶剂和芳族基团影响了对映体选择性,并且发现不对称诱导与芳环上取代基的位置之间存在相关性。