Process for preparing malonate derivatives or beta -keto esters from epoxide derivatives
申请人:Samsung Electronics Co., Ltd.
公开号:US20020035290A1
公开(公告)日:2002-03-21
A process for preparing a malonic acid monoester or &bgr;-ketoester from an epoxide includes the steps of reacting an epoxide with carbon monoxide and an alcohol in the presence of a catalytic amount of a cobalt compound and at least one promoter to produce a &bgr;-hydroxyester, separating the &bgr;-hydroxyester from the cobalt compound and the promoter, and oxidizing the &bgr;-hydroxyester to produce a malonic acid monoester or &bgr;-ketoester.
Process for preparing 3-Hydroxyesters from epoxide derivatives
申请人:SAMSUNG ELECTRONICS CO., LTD.
公开号:EP1304321A2
公开(公告)日:2003-04-23
Disclosed herein is a novel process for preparing 3-hydroxyesters, comprising: (a) reacting an epoxide derivative with carbon monoxide and alcohol in a solvent at a temperature of 30∼150°C under a pressure of 50∼3000psig by using a catalyst system consisting of a catalytic amount of a cobalt compound and optionally an effective amount of a promoter to produce a 3-hydroxyester or a derivative thereof; (b) separating the resulting product and the solvent from the cobalt compound and the promoter in a stripping column at a temperature of -30∼200°C in an atmosphere of a stabilizing gas; and (c) recycling a part or all of the separated cobalt compound and promoter to the step (a) and repeating the steps (a) through (c).
PROCESS FOR PREPARING 3-HYDROXYESTERS FROM EPOXIDE DERIVATIVES
申请人:——
公开号:US20030109744A1
公开(公告)日:2003-06-12
Disclosed herein is a novel process for preparing 3-hydroxyesters, comprising: (a) reacting an epoxide derivative with carbon monoxide and alcohol in a solvent at a temperature of 30˜150° C. under a pressure of 50˜3000 psig by using a catalyst system consisting of a catalytic amount of a cobalt compound and optionally an effective amount of a promoter to produce a 3-hydroxyester or a derivative thereof; (b) separating the resulting product and the solvent from the cobalt compound and the promoter in a stripping column at a temperature of −30˜200° C. in an atmosphere of a stabilizing gas; and (c) recycling a part or all of the separated cobalt compound and promoter to the step (a) and repeating the steps (a) through (c).