A concise route to two anti-tubulin natural products combretastatin A-4 and erianin has been developed. Combretastatin A-4 was obtained by a Perkin reaction between 3-bromo-4-methoxyphenyl acetic acid and 3,4,5-trimethoxybenzaldehyde, hydroxyl transformation, decarboxylation with a high level of cis-selectivity ( cis/trans = 95/5), and erianin was obtained by subsequent hydrogenation. The overall yields of combretastatin A-4 and erianin were 37.5 and 30.8%, respectively.
两种抗微管蛋白天然产物康柏司他丁 A-4 和麦角苷的简易制备路线已经开发成功。通过3-溴-4-甲氧基苯乙酸和3,4,5-三甲氧基苯甲醛之间的珀金反应、羟基转化、高顺式选择性(顺式/反式=95/5)的脱羧反应,获得了考布他丁 A-4,随后通过氢化反应获得了麦角苷。考布他丁 A-4 和麦角苷的总产率分别为 37.5% 和 30.8%。