Abstract
A simple synthesis of khaplofoline (lb) and dihydroflindersine (4) has been reported. PTC-prenylation of 4-hydroxy-2-quinolone (8 a) gave a mixture of C-, O-and C/O-prenylated compounds (2a, 8b, 8c, 3d, 3e and 8f), 2a being the major product. N-prenylation of 8h gave 3i which yielded 8k after following treatment with aqueous HCl. Acid catalysed cyclisation of 2 a gave a mixture of 4 and 1 b in a ratio of 3:1.
一个简单的合成khaplofoline(lb)和dihydroflindersine(4)的方法已经报道。对4-羟基-2-喹啉酮(8a)进行PTC-异戊烯基化反应得到了一系列C-、O-和C/O-异戊烯基化化合物(2a、8b、8c、3d、3e和8f),其中2a是主要产物。对8h进行N-异戊烯基化反应得到3i,随后经过水合HCl处理得到8k。对2a进行酸催化环化反应得到了4和1b的混合物,比例为3:1。