Preparation of urethane from polyamine and carbon dioxide

Details Preparation of urethane from polyamine and carbon dioxide Preparation of urethane from polyamine and carbon dioxide

1992-11-16

1994-12-06

Anderson, Harold D.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Nitrogen-containing reactant

528 44, 528310, 528315, 528328, 528392, 528423, C08G 6900

Patent

active

053711831

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
Aresta, M. and Quaranta, E., "Role of the Macrocyclic Polyether in the Synthesis of N-Alkylcarbamate Esters from Primary Amines, CO.sub.2 and Alkyl Halides in the Presence of Crown-Ethers", Tetrahedron, 48, 1515-30 6/ (1992).
Yoshida, Y. et al., "Novel Synthesis of Carbamate Ester from Carbon Dioxide, Amines, and Alkyl Halides", Bull. Chem. Soc. Jpn., 62,1534-38 6/ (1989).
Hori, Y. et al., "New Organic Synthesis with DBU: Part 7. Synthesis of Carbonates and Carbamates with Carbon Dioxide Gas as the Starting Material", Chemistry Express, vol. 1, No. 4, pp. 224-227 6/ (1986).

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