| 摘要 |
PR-5784/6792 METHOD FOR PREPARATION OF 8-METHOXY-4,8-DIMETHYL-1-(4-ISOPROPYLPHENYL)-NONANE Disclosed is a method for the preparation of 3-methoxy-4,8-di-methyl-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) hydrcqenating 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. |
