Method for preparation of 8-methoxy-4, 8-dimethyl-1-...

Details Method for preparation of 8-methoxy-4, 8-dimethyl-1-... Method for preparation of 8-methoxy-4, 8-dimethyl-1-...

C - Chemistry, Metallurgy

07

C

260/645.8

C07C 43/166 (2006.01) C07C 41/30 (2006.01) C07C 43/164 (2006.01) C07F 9/54 (2006.01)

Patent

CA 1220789

PR-5784/6792 METHOD FOR PREPARATION OF 8-METHOXY-4,8-DIMETHYL-1-(4-ISOPROPYLPHENYL)-NONANE Abstract of the Disclosure 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 triphenylphos- phine 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 reac- tants, 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.

447198

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