Process for the preparation of 2,4,6-octatriene-1-oic acid and 2,4,6-octatriene-1-ol
申请人:Giuliani S.p.A.
公开号:EP2241543A1
公开(公告)日:2010-10-20
The present invention concerns a process for synthesis of 2,4,6-octatriene-1-oic acid and 2,4,6-octatriene-1-ol, which comprises the following stages:
a) reaction between 2,4-trans-hexadienal and triethyl phosphonoacetate to give ethyl 2,4,6-trans-octatrienoate;
b) alkaline hydrolysis of ethyl 2,4,6-trans-octatrienoate to give the corresponding alkaline salt;
c) acidification of said salt to give 2,4,6-trans-octatrienoic acid, which can be separated or can undergo the following further stages:
d) reaction of the 2,4,6-trans-octatrienoic acid with ethyl chloroformiate to give the mixed anhydride formed by 2,4,6-trans-octatrienoic acid and ethyl carbonic acid;
e) reduction of said mixed anhydride with sodium borohydride to give 2,4,6-transoctatrienol;
and optionally a purification stage of the end product.
本发明涉及一种合成2,4,6-辛三烯-1-酸和2,4,6-辛三烯-1-醇的方法,包括以下步骤:a) 2,4-顺-己二烯和三乙基磷酸乙酯反应,得到乙酸2,4,6-顺-辛三烯酯;b) 碱性水解乙酸2,4,6-顺-辛三烯酯,得到相应的碱性盐;c) 酸化上述盐,得到2,4,6-顺-辛三烯酸,可以分离或可以经历以下进一步步骤:d) 2,4,6-顺-辛三烯酸与氯乙酸乙酯反应,得到由2,4,6-顺-辛三烯酸和乙酸乙酯形成的混合酐;e) 用硼氢化钠还原该混合酐,得到2,4,6-顺-辛三烯醇;以及可选的最终产物纯化阶段。