A process for preparing a 3-hydroxy-&ggr;-butyrolactone derivative represented by the following formula (1):
wherein R is C1-C6 alkyl, 3 to 6-membered cycloalkyl, aralkyl, 2-alkenyl, acyl, &agr;-hydroxyalkyl, alkoxycarbonylalkyl or alkoxycarbonyl, which is characterized in treating 3-hydroxy-&ggr;-butyrolactone with a metal salt of hexamethyldisilazane and then, reacting it with an electrophilic reagent, optionally in the presence of a reaction promoter.
一种制备下式(1)所示的3-羟基-&ggr;
-丁内酯衍
生物的方法:其中R是C1-C6烷基,3-6环脂肪基,芳基烷基,2-烯基,酰基,&agr;-羟基烷基,烷氧羰基烷基或烷氧羰基,其特征在于用
六甲基二硅氮烷的
金属盐处理3-羟基-&ggr;
-丁内酯,然后在电子亲和试剂的作用下反应,可选择在反应
促进剂的存在下进行。