Process for preparing N,N'-disubstituted urea

Details Process for preparing N,N'-disubstituted urea Process for preparing N,N'-disubstituted urea

1990-10-31

1992-02-25

Raymond, Richard L.

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

Organic compounds

Amino nitrogen containing

564 47, 564 48, 564 53, 564 55, C07C27528, C07C27530

Patent

active

050915711

ABSTRACT:
A process for preparing N, N-disubstituted urea and more particularly, to an improved process for preparing N,N'-disubstituted urea derivatives of the following formula (I) comprising ##STR1## wherein each of Ar.sup.1 and Ar.sup.2 represents unsubstituted aromatic radical or aromatic radical substituted with halogen, atom, alkyl group, or alkoxy group, and Ar.sup.1 and Ar.sup.2 are the same or different, reacting aromatic mono-nitro compound, aromatic primary amines, and carbon monoxide in the presence of the catalyst composition consisting of a palladium compound as a main catalyst and an ammonium or a phosphonium salt containing halogen atom aS a co-catalyst, and a non-polar solvent.

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Fukuoka et al., Chemtech Nov. 198 , 670-676.
Can J. Chem., 40, 1718, 1962.
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J. Org. Chem., 26, 3309, 1961, Franz et al.
J. Am. Chem. Soc., 93, 6344, 1971.
J. Org. Chem. vol. 40 (19), 2819, 1975, Dieck et al.

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