Process for preparing 1-(4-chlorophenyl)-4,4-dimethyl-pentan-3-o

Details Process for preparing 1-(4-chlorophenyl)-4,4-dimethyl-pentan-3-o Process for preparing 1-(4-chlorophenyl)-4,4-dimethyl-pentan-3-o

1996-02-15

1997-06-17

Reamer, James H.

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

Organic compounds

Oxygen containing

568318, C07C 4562

Patent

active

056399170

ABSTRACT:
There is described a continuous process for preparing 1-(4-chlorophenyl)-4,4-dimethyl-pentan-3-one from 1-(4-chlorophenyl)-4,4-dimethyl-pent-1-en-3-one, wherein the 1-(4-chlorophenyl)-4,4-dimethyl-pent-1-en-3-one is hydrogenated in the liquid phase in alcoholic solution with hydrogen at a pressure of from 50 to 400 bar and a reaction temperature of from 80.degree. to 160.degree. C. over support-free shaped bodies of pressed powders of the elements of the iron subgroup of transition group VIII of the Periodic Table or their alloys or mixtures with one another or their alloys or mixtures with elements of transition group VI, which shaped bodies are arranged in a fixed bed, to give 1-(4-chlorophenyl)-4,4-dimethyl-pentan-3-one. The shaped bodies have a compressive strength of from 20 to 250N and an internal surface area of from 10 to 80 m.sup.2 /g.

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J.S. Gillespie, Jr. et al., Tetrahedron, vol. 31, pp. 3 -8, (1975).
Chemical Abstracts, vol. 84, abstract No. 73906u, p. 415, abstract of FR 2,253,505, (1976).

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