Process for the production of aromatic carbamates

Details Process for the production of aromatic carbamates Process for the production of aromatic carbamates

1996-06-27

1997-12-16

Shippen, Michael L.

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

Organic compounds

Carboxylic acid esters

560 25, 560 26, 560 27, 560 28, 560 29, 560 30, 560 31, 560 32, 560 33, C07C26100

Patent

active

056987315

ABSTRACT:
A process is described for the preparation of aromatic carbamates in which an organic carbonate in a stoichiometric quantity or in a quantity higher than the stoichiometric value is reacted with an aromatic amine operating in the presence of a carbamation catalyst, wherein this catalyst is selected from N,N-substituted carbamate complexes of zinc or copper.
The process gives high yields and selectivity in the useful reaction product.

REFERENCES:
patent: 3763217 (1973-10-01), Brill
patent: 4268683 (1981-05-01), Gurgiolo
patent: 4268684 (1981-05-01), Gurgiolo
patent: 4395565 (1983-07-01), Romano et al.
patent: 4550188 (1985-10-01), Frulla
patent: 4567287 (1986-01-01), Frulla
patent: 5091556 (1992-02-01), Calderoni
Chemical Abstracts, vol. 92, No. 25, AN 215096w, p. 591, 1980, T. Onoda, et l., "Carbamate Esters".
Ser. No. 08/671,179 Jun. 27, 1996 pending.
Ser. No. 08/671,212 Jun. 27, 1996 pending.

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