Process for the preparation of aromatic bis dialkyl ureas

Details Process for the preparation of aromatic bis dialkyl ureas Process for the preparation of aromatic bis dialkyl ureas

1988-03-14

1991-02-26

Elmore, Carolyn S.

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

Organic compounds

Amino nitrogen containing

564 48, C07C27540, C07C27318

Patent

active

049963597

ABSTRACT:
Aromatic bis (dialkyl) ureas such as the bis (dimethyl) urea of 2,4-toluenediamine are prepared by reacting an aromatic diamine with isocyanic acid (HNCO) to convert the amino groups of the diamine to urea groups (--NHCONH.sub.2) to give an aromatic bis urea which is then reacted with a dialkyl amine having from 1 to 8 carbon atoms to produce the desired aromatic bis (dialkyl) urea.

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Ivanov, N. A., et al., Chemistry Department, Kalinin Agricultural Inst., 6 pgs.
Y. Shimonura, et al., Fukui Daigaku Kogakuba Kenkyu Hokoku, vol. 31, No. 2, pp. 115-127, 1983.
Sandler Organic Functional Group Prep. II, vol. 12, (1971), pp. 138-139.

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