Process for making intermediates for fragrance components from α-campholenic aldehyde
申请人:Millennium Specialty Chemicals, Inc.
公开号:US07262329B1
公开(公告)日:2007-08-28
A two-step aldol condensation process is disclosed. α-Campholenic aldehyde (ACA) and methyl ethyl ketone (MEK) react in the presence of a base under conditions effective to produce a mixture comprising a high yield of ketol condensation products. Dehydration of the ketols in the presence of an organic sulfonic acid provides unsaturated ketones that are valuable intermediates for fragrance components for synthetic sandalwood products. Compared with the usual one-step, base-catalyzed approach, the two-step process increases the yield of all condensation products and maximizes production of the most valuable ketone isomers.
该文介绍了一种两步醛缩合成过程。在碱存在下,α-蒎烯醛(ACA)和甲乙酮(MEK)反应,条件有效地产生了一种高收率的酮缩合物混合物。在有机磺酸存在下,脱水酮缩合物可以提供有价值的不饱和酮,作为合成檀香木产品的香料成分的中间体。与通常的一步法碱催化方法相比,这种两步法提高了所有缩合产物的产率,并最大化了最有价值的酮异构体的产量。