Process for the preparation of mono- and oligourethanes

Details Process for the preparation of mono- and oligourethanes Process for the preparation of mono- and oligourethanes

1991-05-13

1993-05-11

Dees, Jose G.

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

Organic compounds

Carboxylic acid esters

560125, 560127, 560132, 560157, 560158, 560162, 560163, C07C26906, C07C22900

Patent

active

052102734

ABSTRACT:
This invention relates to a process for the preparation of N,N-disubstituted mono- and oligourethanes by the reaction of N-aromatically, N-aliphatically, N-cycloaliphatically, and N-araliphatically substituted mono- and oligourethanes with dialkyl carbonates in the presence of at least stoichiometrically equivalent quantities of solid alkali or alkaline-earth carbonate in excess dialkyl carbonate and/or an aprotic organic solvent and in the presence of a phase transfer catalyst.

REFERENCES:
patent: 4595533 (1986-06-01), Thompson
U. Peter, Houben-Weyl, vol. E4, p. 169, 1983.
S. Julia, A. Ginebreda, Anale de Quimica, vol. 75, p. 348, 1979.

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