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公开(公告)号:US06586635B2
公开(公告)日:2003-07-01
申请号:US10132195
申请日:2002-04-26
申请人: Nongyuan Shi , Bernd Drapal , Steffen Krill , Markus Julino , Klaus Huthmacher
发明人: Nongyuan Shi , Bernd Drapal , Steffen Krill , Markus Julino , Klaus Huthmacher
IPC分类号: C07C4571
CPC分类号: C07C45/513 , C07C45/62 , C07C49/203 , C07C49/04
摘要: A process for the preparation of &bgr;,&ggr;,&dgr;-unsaturated ketones and/or &agr;,&bgr;,&ggr;,&dgr;-unsaturated ketones by the reaction of an unsaturated alcohol with an enol ether or mixture of enol ethers, with formation of ketals as a by-product, at temperatures of from 50° C. to 200° C., in the presence of an acid catalyst, whereby one or all of the reagents is/are heated to the reaction temperature of from 50° C. to 200° C. before the acid catalyst is added.