boxylates in good to excellent yields, with retention of the original stereochemistry of the systems. These methyl ketones and an open chain congener, benzyl levulinate, were inert toward m-chloroperbenzoic acid. The cis-isomer and benzyl levulinate underwent normal Baeyer-Villiger reactions mediated by trifluoroperacetic acid, forming moderate yields of the acetate ester insertion products.
用乙氧基
镁二叔
丁基丙二酸酯处理顺式和反式-2-羰基苄氧基
环丙烷羧酸和
氯甲酸乙酯的混合酸酐,然后用
对甲苯磺酸处理所得的加合物,得到顺式和反式苄基-2-乙酰基
环丙烷羧酸酯。保留了系统原始的立体
化学,收率好至优异。这些甲基酮和开链同源物
乙酰丙酸苄酯对间
氯过
苯甲酸呈惰性。顺式异构体和
乙酰丙酸苄酯经历了
三氟过氧乙酸介导的正常Baeyer-Villiger反应,形成了适量的
乙酸酯插入产物。