作者:Seung-Yong Seo、Dongyun Shin、Taek-Soo Kim
DOI:10.1055/s-0034-1378690
日期:——
b-2-aminobicyclo[2.2.1]heptane-2-carboxylic acid is described. Substrate-controlled α-carboxylation of norbonene monoester delivered the asymmetric diester intermediate with high diastereoselectivity (up to 35:1). Sequential chemoselective ester cleavage, Curtius rearrangement, and hydrolysis gave the a- and b-isomers of 2-aminobicyclo[2.2.1]heptane-2-carboxylic acid, respectively.
描述了一种用于立体选择性合成 a-和 b-2-氨基双环 [2.2.1] 庚烷-2-羧酸的简便方法。降冰片烯单酯的底物控制的 α-羧化产生了具有高非对映选择性(高达 35:1)的不对称二酯中间体。依次化学选择性酯裂解、Curtius 重排和水解分别得到 2-氨基双环 [2.2.1] 庚烷-2-羧酸的 a-和 b-异构体。