申请人:Fuji Photo Film Co., Ltd.
公开号:US03992449A1
公开(公告)日:1976-11-16
1-(.gamma.-Aminopropyl)-2,5-dihydroxybenzene and derivatives thereof having additional substituents on the benzene nucleus, .beta.-(2,5-di-lower alkoxyphenyl)acrylonitriles and derivatives thereof having additional substituents on the benzene nucleus, and .gamma.-aminopropyl-2,5-di-lower alkoxybenzenes and derivatives thereof having additional substituents on the benzene nucleus and a process for producing 1-(.gamma.-aminopropyl)-2,5-dihydroxybenzene or derivatives thereof having additional substituents on the benzene nucleus which comprises reacting a 2,5-di-lower alkoxybenzaldehyde or a derivative thereof having additional substituents on the benzene nucleus in the 3-, 4- and/or 6-positions (wherein the substituents can be one or more of an alkyl group of 5 or less carbon atoms or a halogen atom) with cyanoacetic acid or an ester thereof to form a .beta.-(2,5-di-lower alkoxyphenyl)acrylonitrile or a derivative thereof having additional substituents on the benzene nucleus, catalytically reducing the product, with or without previously isolating the product, to form a .gamma.-aminopropyl-2,5-di-lower alkoxybenzene or a derivative thereof having additional substituents on the benzene nucleus, and then dealkylating the product obtained in the reduction, with or without previously isolating the product.
1-(γ-氨丙基)-2,5-二羟基苯及其苯环上具有附加取代基的衍生物,β-(2,5-二-低烷氧基苯基)丙烯腈及其苯环上具有附加取代基的衍生物,以及γ-氨丙基-2,5-二-低烷氧基苯及其苯环上具有附加取代基的衍生物,以及制备1-(γ-氨丙基)-2,5-二羟基苯或其苯环上具有附加取代基的衍生物的方法,包括将2,5-二-低烷氧基苯甲醛或其苯环上具有附加取代基的衍生物在3-、4-和/或6-位(其中取代基可以是一个或多个5个或更少碳原子的烷基或卤素原子)与氰乙酸或其酯反应,形成β-(2,5-二-低烷氧基苯基)丙烯腈或其苯环上具有附加取代基的衍生物,催化还原产物,先隔离或不隔离产物,形成γ-氨丙基-2,5-二-低烷氧基苯或其苯环上具有附加取代基的衍生物,然后脱烷基化还原产物,先隔离或不隔离产物。