Process for producing cyclohexenes

Details Process for producing cyclohexenes Process for producing cyclohexenes

1980-11-10

1982-04-06

Trousof, Natalie

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

Organic compounds

Oxygen containing

C07C 4562, C07C 4500

Patent

active

043237118

ABSTRACT:
A process for producing 3-(5-hydroxy-3-methyl-1,3-pentadienyl)-2,4,4-trimethyl-2-cyclohexen-1-one, an intermediate for canthaxanthin, by hydrogenation of 5-(2,6,6-trimethyl-3-oxo-cyclohexen-1-yl)-3-methyl-2-penten-4-yn-1-ol with zinc and a carboxylic acid.

REFERENCES:
patent: 3624105 (1971-11-01), Surmatis et al.
patent: 4098827 (1978-07-01), Rosenberger
patent: 4157345 (1979-06-01), Rosenberger
patent: 4204073 (1980-05-01), Kienzle
Akhrem et al., Chem. Abst., vol. 76, #45800w, (1972).
Morris et al., Chem. Abst., vol. 76, #112609f, (1972).
Fieser et al., "Reagents for Organic Synthesis, pp. 1276-1283, (1967), Wiley & Sons Inc.

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