Oxidative Cleavage of 4,6-<i>O</i>-Benzylidene Ring with t-Butyl Hydroperoxide and Copper(II) Chloride. Preparation of Methyl 4-<i>O</i>- and 6-<i>O</i>-Benzoylhexopyranoside Derivatives
作者:Ken-ichi Sato、Tetsutaro Igarashi、Yukio Yanagisawa、Nobuya Kawauchi、Hironobu Hashimoto、Juji Yoshimura
DOI:10.1246/cl.1988.1699
日期:1988.10.5
Copper(II) chloride and palladium(II) acetate were found to be highly effective catalysts for oxidative cleavage of O-benzylidene ring with t-butyl hydroperoxide. Using the former catalyst 4,6-O-benzylidenehexopyranoside derivatives were converted into the corresponding 4- and 6-benzoates in high yields. This reaction was also applicable for conversion of benzyl group into benzoyl one.
发现
氯化
铜 (II) 和
乙酸钯 (II) 是使用叔
丁基氢过氧化物氧化裂解 O-亚
苄基环的高效
催化剂。使用前一种
催化剂,4,6-O-亚
苄基己基
吡喃糖苷衍
生物以高产率转化为相应的4-和6-
苯甲酸酯。该反应也适用于将
苄基转化为
苯甲酰基。