Process for preparing omega-halo-ketones

Details Process for preparing omega-halo-ketones Process for preparing omega-halo-ketones

1995-02-28

1996-03-12

Lone, Werren B.

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

Organic compounds

Oxygen containing

568838, C07C 4916

Patent

active

054988020

ABSTRACT:
A process for preparing 6-chloro-2-hexanone which comprises the steps of (a) dehydrating cyclohexanol in the presence of a suitable catalyst and at a suitable temperature and for a sufficient period of time to form cyclohexene; (b) rearranging said cyclohexene at a higher temperature than in step (a) in the presence of a suitable catalyst and for a sufficient period of time to form 1-methylcyclopentene; (c) hydrating said 1-methylcyclopentene at a temperature lower than step (b) and in the presence of a resin catalyst for a sufficient period of time to form 1-methylcyclopentanol; (d) reacting said 1-methylcylcopentanol with a suitable amount of an alkali metal hypochlorite in the presence of a carboxylic acid to form 1-methylcyclopentyl hypochlorite; and (e) heating said 1-methylcyclopentyl hypochlorite for a sufficient period of time to form 6-chloro-2-hexanone.

REFERENCES:
patent: 2497349 (1950-02-01), Farkas
patent: 4189469 (1980-02-01), Gleixner et al.
patent: 4260845 (1981-09-01), Shioyama
patent: 4588846 (1986-05-01), Mitsui et al.
patent: 4661639 (1987-04-01), Tojo et al.
patent: 4849550 (1989-07-01), Shirafuji et al.

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