Process for preparing gamma-caprolactone by isomerization of eps

Details Process for preparing gamma-caprolactone by isomerization of eps Process for preparing gamma-caprolactone by isomerization of eps

1984-06-25

1986-09-09

Fan, Jane T.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D30732

Patent

active

046110690

ABSTRACT:
A process for preparing gamma-caprolactone comprising isomerizing epsilon-caprolactone in an aqueous medium in the presence of catalytically effective amounts of hydriodic acid or hydrobromic acid wherein the catalyst is optionally promoted with a Group VIII metal. The temperature for the reaction is in the range of about 175.degree. C. to about 250.degree. C. and the ratio of water to epsilon-caprolactone is at least about 1:1.

REFERENCES:
patent: 3004989 (1961-10-01), Hasek et al.
patent: 3786069 (1974-01-01), Aviron-Violet et al.
patent: 3944572 (1976-03-01), King et al.
Tan CA. 81-135925y.
Rylander, Organic Synthesis with Noble Metal Catalysts, Academic Press, 1973.

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