Transesterification of carboxylic or carbonic esters

Details Transesterification of carboxylic or carbonic esters Transesterification of carboxylic or carbonic esters

1985-08-23

1987-07-21

Daus, Donald G.

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

Organic compounds

Carbonate esters

560103, 560217, 560234, C07C 6702, C07C 6806

Patent

active

046819673

ABSTRACT:
A process for the transesterification of a carboxylic or carbonic acid ester comprises reacting the carboxylic or carbonic acid ester under transesterification conditions with an alcohol in the presence, as catalyst, of either (i) a Group V element-containing Lewis base and an epoxide or (ii) a cyclic amidine.
The Lewis base can be an organic compound containing trivalent phosphorus or nitrogen and can be an amine, for example an amidine.
The process can be operated in the liquid phase at a temperature of from 15.degree. to 150.degree. C., and the catalyst is employed in solution.
Preferred catalysts are those where the cyclic amidine forms part of a fused ring system containing six and five membered rings, six and seven membered rings or two six membered rings.

REFERENCES:
patent: 4216298 (1980-08-01), Schreckenberg et al.
Fife et al., J. Am. Chem. Soc., vol. 95, No. 5, pp. 2059-2061, (1973).

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