Method for preparation of 8-methoxy-4,8-dimethyl-1-(4-isopropylp

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

1983-02-14

1984-11-13

Helfin, Bernard

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568 9, C07C 4118

Patent

active

044827512

ABSTRACT:
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.

REFERENCES:
patent: 4002769 (1977-01-01), Schwarz et al.
Adams et al., Organic Reactions, vol. 14, (1965), 388-389.

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