The invention relates to a method of preparing an optically active cyanohydrin carboxylic acid ester from an optically active cyanohydrin of opposite configuration, wherein said starting cyanohydrin is converted with a carboxylic acid in the presence of a dialkyl azodicarboxylate and a triarylphosphine. The invention also relates to a method of preparing an optically active cyanohydrin of opposite configuration by a subsequent solvolysis of the ester obtained under conservation of the configuration.
该发明涉及一种从相反构型的光学活性
氰醇羟基腈酸酯制备光学活性
氰醇羟基腈酸酯的方法,其中所述起始
氰醇羟基腈酸酯在二烷基偶氮二
羧酸酯和三芳基膦的存在下与
羧酸反应转化。该发明还涉及一种通过在保持构型的情况下对所得酯进行后续溶剂解的方法制备相反构型的光学活性
氰醇羟基腈酸酯。