Intramolecular O–H insertion of acetodiazoacetate esters gave cyclic ethers of up to 86% diastereomer excess when 2,4-pentanediol was employed as a chiral tether. The selectivity of the reaction was suggested to be determined at the later stage of the reaction after dissociation of the catalyst.
当使用
2,4-戊二醇作为手性系链时,乙酰二
苯甲酸酯的分子内 O-H 插入反应可产生非对映异构体过量率高达 86% 的
环醚。据认为,反应的选择性是在催化剂解离后的反应后期决定的。