Process for producing 4,4,7-trimethyl-3,4,7,8-tetrahydro...

Details Process for producing 4,4,7-trimethyl-3,4,7,8-tetrahydro... Process for producing 4,4,7-trimethyl-3,4,7,8-tetrahydro...

C - Chemistry, Metallurgy

07

C

167/321, 260/581

C07C 49/637 (2006.01) C07C 45/66 (2006.01) C07C 45/67 (2006.01) C07C 45/78 (2006.01) C07C 45/79 (2006.01) C07C 45/82 (2006.01) C11B 9/00 (2006.01)

Patent

CA 1282079

ABSTRACT 4,4,7-trimethyl-3,4,7,8-tetrahydro-2(6H)-naphthalen -one is obtained by an elimination reaction from 3-oxo-.alpha. -ionol by way of direct addition thereof to a solution of a protonic acid in an inert solvent at an elevated temperature, or following its conversion into a lower alkyl ester, particularly the acetate thereof, by way of the treatment of the latter, preferably with sodium acetate, in a polar non-protonic solvent at 150 - 300°C, wherein the output can be increased by raising the temperature of reaction. The product of the process is suitable, in pure form or as mixed with simultaneously produced 3,5,5-trimethyl- 4-butenylidene-cyclo-hex-2-en-1-one, as an odoriferous substance or as a fragrant substance for foods and tobacco.

507330

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