A simple and efficient protocol is described for the regioselective hydrolysis of terminal isopropylidene ketal protection in carbohydrate derivatives 1a - 11a. It uses either CoCl2 · 2H2O in acetonitrile or InCl3 in methanol at temperatures ranging from 50 to 60 °C. The low cost of CoCl2·2H2O along with its requirement in catalytic quantities offers a great advantage for the multi-gram scale reaction.
描述了一种简单高效的协议,用于糖衍
生物1a-11a中端异丙基亚甲基保护基的区域选择性
水解。它可以在50至60°C范围内使用
乙腈中的CoCl
2·2H
2O或
甲醇中的InCl
3。CoCl
2·2H
2O的低成本以及其在催化量下的需求为多克级反应提供了巨大优势。