Transesterification route to quaternary ammonium substituted car

Details Transesterification route to quaternary ammonium substituted car Transesterification route to quaternary ammonium substituted car

1990-09-14

1992-10-06

Springer, David B.

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

Organic compounds

Carbonate esters

558274, 558 28, C07C 6996

Patent

active

051533480

ABSTRACT:
A process is reported for preparation of quaternary ammonium-type carbonate esters which are useful as bleach precursors in detergent compositions. The process involves transesterification of low molecular weight carbonates, e.g. diphenyl carbonate, with quaternary ammonium functionalized alcohols, e.g. choline chloride. Preferably the reaction is run in a high dielectric constant aprotic solvent such as acetonitrile. The reaction may also be conducted neat utilizing liquefied carbonate reactant as a solvent medium.

REFERENCES:
patent: 2691017 (1954-10-01), Dornfeld
patent: 4217438 (1980-08-01), Brunelle et al.
patent: 4349486 (1982-09-01), Brunelle et al.
patent: 4739076 (1988-04-01), Southwick
patent: 4751015 (1988-06-01), Humphreys et al .

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