Preparation of methylenedi (phenylurethane)

Details Preparation of methylenedi (phenylurethane) Preparation of methylenedi (phenylurethane)

1990-06-29

1991-11-26

Dees, Jose G.

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

Organic compounds

Carboxylic acid esters

560 27, C07C125073

Patent

active

050683918

ABSTRACT:
The bis-(N-carboalkoxyanilino)methanes, optionally in the presence of at least one alkyl N-phenylcarbamate, are selectively rearranged into methylenedi(phenylurethane), MDU, in the presence of an effective amount of hydrofluoric acid.

REFERENCES:
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patent: 4230877 (1980-10-01), Shawl et al.
patent: 4243815 (1981-01-01), Merger et al.
patent: 4282370 (1981-12-01), Pope
patent: 4319018 (1982-03-01), Miyata et al.
patent: 4328354 (1982-05-01), Merger et al.
patent: 4476317 (1984-10-01), Wada
patent: 4543419 (1985-09-01), Shawl

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