A concise synthesis of fumagillol was accomplished in twelve steps starting from cyclohexadiene, proceeding by way of ring-opening of a symmetrical protected epoxydiol with a cuprate reagent and subsequent protecting group manipulation to give a key ketone intermediate. Installation of the required epoxide functions was achieved by addition of chloromethyllithium to the ketone and by directed epoxidation of the unsaturated side-chain.
我们以环
己二烯为起点,通过用
铜酸盐试剂对对称保护环氧二醇进行开环反应,并随后对保护基团进行处理,从而得到一个关键的酮中间体,经过十二个步骤完成了烟嘧
酚的简明合成。通过将
氯甲基锂加到酮中,并对不饱和侧链进行定向环氧化反应,实现了所需的环氧功能。