Preparation of urethane and carbonate products

Details Preparation of urethane and carbonate products Preparation of urethane and carbonate products

1991-04-29

1993-06-29

Dees, Jose G.

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

Organic compounds

Carboxylic acid esters

554114, 560 32, 560115, 560157, 560158, 560160, 560163, 558260, 558277, C07C26904

Patent

active

052236382

ABSTRACT:
The present invention provides a process for preparing urethanes and carbonates from an amine or an alcohol, carbon dioxide and a hydrocarbyl halide. The amine or alcohol is reacted with carbon dioxide in a suitable solvent system and in the presence of an amidine or guanidine base, to form the ammonium carbamate or carbonate salt which is then reacted in a polar aprotic solvent with a hydrocarbyl halide. Polymer products can also be prepared utilizing this process or utilizing the resulting urethanes and carbonates under standard polymerization conditions.

REFERENCES:
patent: 4467089 (1984-08-01), Bechara
Hoji et al., Chem. Express, 1(4), pp. 224-227 (1986) Kinki Chemical Society, Japan.
Yoshida et al., Bull. Chem. Soc. Jpn. 62, 1534 (1989).

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