Simplified, high-yield regioselective synthesis of 10-aminocolchicides and 2-aminotropones
作者:Marino Cavazza、Francesco Pietra
DOI:10.1016/0040-4039(95)00499-3
日期:1995.5
Treatment of colchiceine with BF3OEt2, followed by evaporation, addition of DMSO and a secondary amine like piperidine, or sterically hindered like 2-methylpiperidine, was found to result in rapid, quantitative replacement of the hydroxyl group at C-10 or C-9 by the amine to give the 10-aminocolchicide/9-aminoisocolchicide or with high regiospecificity for 10-aminocolchicide; the products could be
发现用BF 3 OEt 2处理秋水仙碱,然后蒸发,添加DMSO和仲胺(如哌啶)或空间受阻胺(如2-甲基哌啶)可快速,定量地取代C-10或C处的羟基通过胺-9,得到10-氨基杀菌剂/ 9-氨基异杀菌剂或对10-氨基杀菌剂具有高区域特异性的化合物;产品可以轻松分离,方法学扩展到托酚酮和/或伯胺。