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2. 发明公开

EP1178945A1 REACTIONS USING LEWIS ACIDS 审中-公开
标题翻译： REAKENEN UNTER VERWENDUNG VON LEWIS-SÄUREN
公开(公告)号：EP1178945A1
公开(公告)日：2002-02-13
申请号：EP00927561.1
申请日：2000-05-11
申请人： QUEST INTERNATIONAL B.V.
发明人： DAVEY, Paul, Nicholas , TSE, Chi-Lam
IPC分类号： C01G9/04 , C07B61/00 , C07C29/56 , C07C29/17 , C07C35/12
CPC分类号： C07C29/172 , C01G9/003 , C01G9/04 , C07B63/00 , C07C29/56 , C07C2601/14 , C07C35/12 , C07C35/17
摘要： In a method of performing a chemical reaction using a Lewis acid, after the reaction is complete, the Lewis acid is extracted from the reaction product in the form of an aqueous solution, followed by drying of the aqueous solution of the Lewis acid. The dried Lewis acid can be reused in a further similar reaction. The method can be repeated several times, using the same batch of Lewis acid, without the activity and specificity of the Lewis acid being significantly affected. The invention has been used to good effect in the ene reaction of isopulegol from citronellal, the Diels-Alder reaction of myrcene and 3-methyl-3-penten-2-one and the rearrangement reaction of α-pinene oxide to campholenic aldehyde using zinc bromide as a Lewis acid catalyst. The invention can thus provide an environmentally acceptable and efficient method for using Lewis acids in industrial processes.
摘要翻译：在使用路易斯酸进行化学反应的方法中，反应后，路易斯酸以水溶液的形式从反应产物中提取，然后干燥路易斯酸的水溶液。干燥的路易斯酸可以再次用于进一步类似的反应。该方法可以重复几次，使用相同批次的路易斯酸，而不影响路易斯酸的活性和特异性。已经使用本发明在使用溴化锌作为用于环化反应的路易斯酸催化剂的香茅醛制备异丙醇中有很好的效果。因此，本发明可以提供环境可接受和有效的方法，用于以外消旋和对映异构体纯的形式从香茅醛生产异丙醇。

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