Process for preparation of substituted phenylureas

Details Process for preparation of substituted phenylureas Process for preparation of substituted phenylureas

1986-02-07

1989-03-21

Warren, Charles F.

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

Organic compounds

Amino nitrogen containing

564 48, 564 53, 564 54, C07C12719

Patent

active

048144991

ABSTRACT:
Process for preparing a substituted phenylurea.
A suitably substituted aniline, excess urea in a mole ratio of at least 1.1 with respect to the aniline, and a secondary amine are reacted simultaneously in a non-hydroxyl-containing organic solvent at a temperature of 130.degree. to 250.degree. C., with removal of ammonia as it forms.
The phenylureas obtained are used as herbicides.

REFERENCES:
patent: 2673877 (1951-10-01), Thompson
patent: 2729677 (1956-01-01), Gilbert et al.
patent: 2768971 (1956-10-01), Jones
patent: 2878284 (1959-03-01), K'Burg
patent: 3177249 (1965-04-01), Martin et al.

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