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公开(公告)号：US5728892A
公开(公告)日：1998-03-17
申请号：US746162
申请日：1996-11-06
CPC分类号： C07C45/74
摘要： The invention relates to a method for preparing an .alpha.-alkylcinnamaldehyde via aldol concensation of a benzaldehyde and an alkanal, with pyrrolidine being employed as a catalyst. The method is suitable, in particular, for preparing .alpha.-hexylcinnamaldehyde by aldol condensation of benzaldehyde and n-octanal, in particular for preparing .alpha.-hexylcinnamaldehyde of olfactory quality, since it was found that, in the method according to the invention, relatively little .alpha.-hexyldecenal, the aldol condensation product of n-octanal, is formed. Preferably, the aldol condensation is carried out without a solvent in the presence of an acid, and the alkanal is metered in over time to a mixture which contains pyrrolidine and benzaldehyde.
摘要翻译： 本发明涉及通过苯甲醛和链烷醛的醛醇缩合制备α-烷基肉桂醛的方法，其中吡咯烷用作催化剂。 该方法特别适用于通过苯甲醛和正辛醛的醛醇缩合制备α-己基肉桂醛，特别是用于制备嗅觉质量的α-己基肉桂醛，因为发现在根据本发明的方法中，相对较少 形成正辛醛醛醛缩合产物α-正癸醛。 优选地，醛酸缩合在没有溶剂的情况下在酸的存在下进行，并且将烷醛随时间计量加入到含有吡咯烷和苯甲醛的混合物中。
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公开(公告)号：US5319125A
公开(公告)日：1994-06-07
申请号：US39745
申请日：1993-03-30
IPC分类号： B01J31/02 , B01J31/04 , C07B61/00 , C07C253/30 , C07C255/31
CPC分类号： C07C255/31
摘要： The invention relates to a method for the preparation of a 2-(2-cyanoethyl)-cyclopentanone by reaction of a cyclopentanone which contains at least one .alpha.-H atom with an .alpha.,.beta.-unsaturated nitrile in the presence of a catalytic amount of pyrrolidine as catalyst and optionally also a catalytic amount of an acid compound. A high selectivity and a high catalyst activity are achieved with the method.
摘要翻译： 本发明涉及一种通过在含有至少一个α-H原子的环戊酮与α，β-不饱和腈的反应中制备2-（2-氰乙基） - 环戊酮的方法， 吡咯烷作为催化剂和任选地还有催化量的酸化合物。 该方法可以实现高选择性和高催化活性。
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