Process for the preparation of alkyl .gamma.,.delta.-unsaturated

Details Process for the preparation of alkyl .gamma.,.delta.-unsaturated Process for the preparation of alkyl .gamma.,.delta.-unsaturated

1976-12-22

1978-05-09

Douglas, Winston A.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

560122, C11C 302

Patent

active

040886646

ABSTRACT:
Process for the preparation of .gamma.,.delta.-unsaturated carboxylate esters which comprises reacting an .alpha.,.beta.-unsaturated alcohol with a trialkyl orthopropionate in the presence of an organic acid having pk.sub.a of about 7 to 9.
Among the thus obtained .gamma.,.delta.-unsaturated carboxylate esters, 2,5,9-trimethyl-deca-3,4,8-triene-carboxylates and 2-methyl-3-[2-methyl-5-isopropenyl-cyclopent-1-en-1-yl]-propionates are particularly useful as intermediates for the preparation of perfuming ingredients.

REFERENCES:
patent: 3928403 (1975-12-01), Fujita et al.
patent: 3937723 (1976-02-01), Schulte-Elte
patent: 3963675 (1976-06-01), Naegeli

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