Production of 2,2-disubstituted propiolactones

Details Production of 2,2-disubstituted propiolactones Production of 2,2-disubstituted propiolactones

1975-09-02

1977-05-17

Dees, Carl F.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252456, 2603439, B01J 2900, B01J 2916

Patent

active

040240800

ABSTRACT:
The present invention relates to a process for the manufacture of 2,2-disubstitued propiolactones from isoanhydrides and formaldehyde, as shown in the following equation: ##STR1## wherein R and R.sup.1 individually may be a straight- or branched-chain alkyl, aryl or aralkyl group having 1 to 10 carbon atoms. The reaction is conducted at a temperature of from about 190.degree. C. to about 400.degree. C. in the presence of a metal oxide-silica gel complex which results from heating the calcined residue of a salt of a metal selected from the group consisting of Ta, Ti, Nb and Zr supported upon a silica gel in the presence of nitrogen and steam at a temperature of from about 650.degree. C. to about 1000.degree. C.

REFERENCES:
patent: 2375402 (1945-05-01), Corson et al.
patent: 2421361 (1947-05-01), Toussaint et al.
patent: 2439852 (1948-04-01), Jackson
patent: 2917561 (1959-12-01), Eby
patent: 3014899 (1961-12-01), Engel

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