Method of condensing N-phenyl carbamates

Details Method of condensing N-phenyl carbamates Method of condensing N-phenyl carbamates

1990-07-25

1992-01-07

Dees, Jose G.

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

Organic compounds

Carboxylic acid esters

560 27, 560 30, 560 31, 560 32, 560 33, C07C26900, C07C27100

Patent

active

050793837

ABSTRACT:
A process for producing 4,4'-diphenylmethane dicarbamates through one-stage condensation by reacting N-phenyl carbamates with a methylenating agent in presence of a zinc halide, as a catalyst. 4,4'-diphenylmethane dicarbamates can be produced with high selectivity and in high yield.

REFERENCES:
patent: 2946768 (1960-07-01), Klauke et al.
patent: 4699994 (1987-01-01), Ikariya et al.

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