8-dimethyltetralin. This compound was then formylated in the 6-position. Baeyer−Villiger oxidation and hydrolysis of the resulting formate gave 6-hydroxy-5-methoxy-1,8-dimethyltetralin. Alkylation of the phenolic hydroxyl group with chloroacetone followed by cyclodehydration gave cacalol methyl ether. Deprotection of this aryl methyl ether yielded cacalol.
已开发出
天然产物卡卡洛尔的简单合成方法,该方法可分七个步骤进行,总产率为21-25%。4-甲基
茴香醚的邻位
锂化和
5-碘-1-戊烯的烷基化,然后进行分子内Friedel-Crafts烷基化,得到5-甲氧基-1,8-二甲基四氢
萘。然后将该化合物在6-位甲酰化。Baeyer-Villiger氧化和所得
甲酸酯
水解得到6-羟基-5-甲氧基-1,8-二甲基四氢化
萘。用
氯丙酮将
酚羟基烷基化,然后环脱
水,得到cacalol甲基醚。将该芳基甲基醚脱保护,得到卡卡洛尔。