PROCESS FOR THE PREPARATION OF $g(a)-ALKYL LACTONES
申请人:HENKEL CORPORATION
公开号:EP0559789A1
公开(公告)日:1993-09-15
US4980342A
申请人:——
公开号:US4980342A
公开(公告)日:1990-12-25
US5231192A
申请人:——
公开号:US5231192A
公开(公告)日:1993-07-27
[EN] PROCESS FOR THE PREPARATION OF alpha -ALKYL LACTONES
申请人:HENKEL CORPORATION
公开号:WO1992009590A1
公开(公告)日:1992-06-11
(EN) Process for the preparation of $g(a)-alkyl lactones by the steps of first reacting an $g(a)-acyl lactone, an aldehyde, and an alkali metal hydroxide together to form an $g(a)-alkylidene lactone, and then hydrogenating the $g(a)-alkylidene lactone.(FR) Procédé de préparation d'$g(a)-alkyl-lactones, consistant à faire réagir entre eux une $g(a)-acyl-lactone, un aldéhyde et un hydroxyde de métal alcalin afin de former une $g(a)-alkylidène-lactone, que l'on hydrogène par la suite.
Process for the preparation of .alpha.-alkyl lactones
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.