申请人:Stauffer Chemical Company
公开号:US04482751A1
公开(公告)日:1984-11-13
Disclosed is a method for the preparation of 8-methoxy-4,8-dimethyl-1-(4-isopropylphenyl)-nonane which comprises the steps of (a) reacting para-isopropylbenzyl chloride with triphenylphosphine in the presence of a suitable solvent for a sufficient period of time and at a sufficient temperature to form an intermediate product in solution, para-isopropylbenzyl triphenylphosphonium chloride, and (b) reacting said solution with sodium methoxide, followed by methoxycitronellal to produce cis- and trans-8-methoxy-4,8-dimethyl-1-(4-isopropylphenyl)-1-nonene, (c) separating said intermediate product from the residual reactants, and (d) hydrogenating said cis- and trans-8-methoxy-4,8-1-(4-isopropylphenyl)-1-nonene, in the presence of a suitable solvent and catalyst to form 8-methoxy-4,8-dimethyl-1-(4-isopropylphenyl)-nonane.
本发明公开了一种制备8-甲氧基-4,8-二甲基-1-(4-异丙基苯基)-壬烷的方法,包括以下步骤:(a)在适当溶剂中,将对-异丙基苯甲基氯与三苯基膦反应,反应时间和温度足够长和高,以形成中间产物对-异丙基苯甲基三苯基膦氯化铵;(b)将该溶液与甲氧基柠檬醛反应,生成顺反异构体的8-甲氧基-4,8-二甲基-1-(4-异丙基苯基)-1-壬烯;(c)从剩余反应物中分离出该中间产物;(d)在适当溶剂和催化剂的存在下,加氢顺反异构体的8-甲氧基-4,8-二甲基-1-(4-异丙基苯基)-1-壬烯,形成8-甲氧基-4,8-二甲基-1-(4-异丙基苯基)-壬烷。