Diaminophenyl ureas

Details Diaminophenyl ureas Diaminophenyl ureas

1979-12-20

1981-01-20

Waltz, Thomas A.

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

Organic compounds

Amino nitrogen containing

548305, C07C12719

Patent

active

042461960

ABSTRACT:
Diaminophenyl ureas of the formula ##STR1## in which R is an inert substituent, are obtained from the corresponding dinitrophenyl urea by way of reduction, especially catalytic hydrogenation. Through a cyclization process, while splitting off ammonia, these ureas yield the corresponding aminobenzimidazolones, advantageously without an intermediate isolation of the diaminophenyl ureas.

REFERENCES:
patent: 3149032 (1964-09-01), Waring
patent: 3674414 (1972-07-01), Kalopissis et al.

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