METHOD FOR NITRATING ISOUREA

WIPO Patent Application WO/2007/105793

A1

Disclosed is a method for commercially advantageously producing an N-nitroisourea, which is useful as a synthetic intermediate for pharmaceutical products and agricultural chemicals, or a salt of such an N-nitroisourea. Specifically disclosed is a method for producing a compound represented by the formula (2) below or a salt thereof, which method comprises a step for reacting a compound represented by the formula (1) below or a salt thereof with a nitrating agent in the presence of sulfur trioxide. (In the formula (1), R1 represents an optionally substituted linear or branched C1-C6 alkyl group; and R2 and R3 independently represent an optionally substituted linear or branched C1-C6 alkyl group, a cycloalkyl group or a substituted aryl group, or alternatively both R2 and R3 represent a hydrogen atom at the same time.) (In the formula (2), R1, R2 and R3 are as defined above.)

YAMAGATA KAZUYUKI (JP)
SEKO SHINZO (JP)

PCT/JP2007/055206

September 20, 2007

March 15, 2007

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SUMITOMO CHEMICAL CO (JP)
YAMAGATA KAZUYUKI (JP)
SEKO SHINZO (JP)

C07C275/70; C07C273/18; C07B61/00

JPH0967342A	1997-03-11
JP2000103775A	2000-04-11
JP2000103776A	2000-04-11
JPH02288860A	1990-11-28
JP2006072577A	2006-03-16
JPH0967342A	1997-03-11
JP2000103775A	2000-04-11
JPH03157358A	1991-07-05

See also references of EP 1997802A4
RECUEIL DES TRAVAUX CHIMIQUES DES PAYS-BAS, vol. 81, 1962, pages 69
JOURNAL OF ORGANIC CHEMISTRY, vol. 26, 1961, pages 412
JOURNAL OF ORGANIC CHEMISTRY, vol. 28, 1963, pages 2653

TANAKA, Mitsuo et al. (IMP Building 3-7, Shiromi 1-chome, Chuo-k, Osaka-shi Osaka 01, JP)

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