Lactones

Details Lactones Lactones

1974-04-08

1976-01-27

Sutto, Anton H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260526N, C07D30732

Patent

active

039352358

ABSTRACT:
A feed material containing the group --O--(CR.sub.2).sub.n --CO-- in a macrocyclic ring or acylic chain is heated to between 300.degree.C and 500.degree.C in the absence of a catalyst to give a mono-unsaturated acyclic carboxylic acid. For example polymeric .epsilon.-caprolactone gives .delta.-.epsilon. hexenoic acid. This acid is then cyclised by heating with a strong protonating agent. In the example the product is .gamma.-caprolactone or 4-hexanolactone.

REFERENCES:
patent: 2876258 (1959-03-01), Phillips et al.
patent: 3037052 (1962-05-01), Bortnick
Ansell et al., Quarterly Reviews, 1964, pp. 211-225, (1964).

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