申请人:Henkel Corporation
公开号:US04980342A1
公开(公告)日:1990-12-25
A convenient process for the preparation of .gamma.-alkyl-substituted-.gamma.-butyrolactones and .delta.-valerolactones is provided. The process involves forming the .alpha.-alkylidene lactone by reacting essentially equimolar amounts of an .alpha.-acyl lactone, an aldehyde, and an alkali metal hydroxide in an inert diluent at an elevated temperature while removing water and hydrogenating the .alpha.-alkylidene lactone to obtain the corresponding .alpha.-alkyl lactone.
提供了一种方便的制备.gamma.-烷基取代的.gamma.-丁内酯和.delta.-戊内酯的过程。该过程涉及在惰性稀释剂中以升高的温度反应基本等摩尔量的.alpha.-酰基内酯、醛和碱金属氢氧化物来形成.alpha.-烷基亚甲基内酯,同时去除水并加氢.alpha.-烷基亚甲基内酯以获得相应的.alpha.-烷基内酯。