作者:Andriy V. Tymtsunik、Yevhen M. Ivon、Igor V. Komarov、Oleksandr O. Grygorenko
DOI:10.1016/j.tetlet.2014.04.038
日期:2014.5
An efficient method for the preparation of Boc-protected 4,5-methano-β-proline—a novel bicyclic cyclopropane-containing β-amino acid—was developed, starting from readily available itaconic acid. A modified Simmons–Smith reaction was used for the construction of the cyclopropane ring. The method allowed for the synthesis of both cis and trans isomers of the title compound in 49% total yield and can
从容易获得的衣康酸开始,开发了一种有效的方法来制备Boc保护的4,5-甲氧基-β-脯氨酸(一种新型的双环含环丙烷的β-氨基酸)。改良的Simmons-Smith反应用于构建环丙烷环。该方法允许以49%的总收率合成标题化合物的顺式和反式异构体,并且可用于克规模的制备。还开发了一种以克数为单位制备5-氧吡咯烷-3-羧酸甲酯的方法,所述5-氧吡咯烷-3-羧酸甲酯是合成方案中的关键中间体之一。