Process for the preparation of 5-chloro-2-pentanone

Details Process for the preparation of 5-chloro-2-pentanone Process for the preparation of 5-chloro-2-pentanone

1989-11-21

1991-02-05

Reamer, James H.

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

Organic compounds

Oxygen containing

549453, 549454, C07C 4559

Patent

active

049906828

ABSTRACT:
A process for the preparation of 5-chloro-2-pentanone starting from a ketal of a levulinic ester, followed by hydrogenation, and then reaction with hydrochloric acid. The process involves first purifying the ketal of the levulinic ester by distillation, making the hydrogenation catalysts for the ketal alkaline, and reacting the 3-(2-methyl-1,3-dioxolan-2-yl)propan-1-ol formed in this hydrogenation with hydrochloric acid to obtain 5-chloro-2-pentanone.

REFERENCES:
patent: 2782243 (1957-02-01), Hess et al.
patent: 4433175 (1984-02-01), Kaufhold
patent: 4533648 (1985-08-01), Corrigan et al.
Williamann et al., Helveutia Chem. Akta, vol. 32, p. 2151 (1949).
Ishimaru, Chem. Abst., vol., #17728 (1957).

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