Preparation of cyclic carbonates using alkylammonium and tertiar

Details Preparation of cyclic carbonates using alkylammonium and tertiar Preparation of cyclic carbonates using alkylammonium and tertiar

1990-10-15

1992-02-25

Shen, Cecilia

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549229, 549230, C07D31712

Patent

active

050915436

ABSTRACT:
A method of preparing five- and six-membered cyclic carbonates is disclosed. The process comprises reacting a 1,2- or 1,3-diol with an acyclic diester of carbonic acid in the presence of a catalyst selected from alkylammonium salts, tertiary amines, and ion-exchange resins containing alkylammonium or tertiary amino groups. Cyclic carbonates free of polycarbonate by-products are obtained in high yields.

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