Synthesis of enantiomerically pure α-amino-β-hydroxy-cyclobutanone derivatives and their transformations into polyfunctional three- and five-membered ring compounds
作者:Léon Ghosez、Gaoqiang Yang、José Renato Cagnon、Franck Le Bideau、Jacqueline Marchand-Brynaert
DOI:10.1016/j.tet.2004.06.085
日期:2004.8
pure bicyclic cyclobutanones. The cycloadditions proceeded with unusual regiochemistry giving predominantly or exclusively protected α-amino-β-hydroxycyclobutanone derivatives. The adducts could be converted into a variety of interesting enantiopure intermediates equipped with many functional groups: α-amino-β-hydroxy cyclopropane carboxylic acid derivatives, α-amino-β-hydroxy succinic acid derivatives
酮基很容易环加成到(R)-叔丁基二氢恶唑2a - d中,得到对映体纯的双环环丁酮。所述环加成反应以不寻常的区域化学进行,主要或仅得到被保护的α-氨基-β-羟基环丁酮衍生物。加合物可以转化为具有许多官能团的各种有趣的对映纯中间体:α-氨基-β-羟基环丙烷羧酸衍生物,α-氨基-β-羟基琥珀酸衍生物,α-氨基-β-羟基内酯和内酰胺衍生物。