C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
260/259, 260/249
C07D 239/28 (2006.01) C07D 251/02 (2006.01) C07D 409/12 (2006.01) C07D 521/00 (2006.01)
Patent
CA 1210398
- 1 - A process for producing sulfonylureas having a herbicidal action and an action-regulating plant growth Abstract A novel process for producing sulfonylureas of the formula I having a herbicidal action and an action regulating plant growth Image (I) wherein A is an unsubstituted or substituted phenyl, naphthyl, furan, thiophene or pyridine group, E is a nitrogen atom or the methine group, Ra is hydrogen, halogen, C1-C5-alkyl, C1-C5-haloalkyl, C1-C5-alkoxy, C1-C5-haloalkoxy, C1-C5-alkylthio or C2-C10-alkoxyalkoxy, and Rb is the same as Ra or is an unsubstituted or substituted amino group, and salts thereof, which process comprises firstly condensing an imidocarbonic acid ester with a sulfonyl chloride of the formula II to the sulfonylimidocarbonic acid diester of the formula IV Image (II) (III) (IV) wherein R is an alkyl group, and reacting this in an ethereal solvent in the presence of sodium hydride or potassium tert- butylate with a 2-aminopyrimidine or 2-amino-1,3,5- triazine of the formula V, and finally reacting the formed sulfonylisourea of the formula VI in an organic solvent with hydrochloric acid to obtain the sulfonylurea of the - 2 - formula I, and isolating this as such or as a salt; Image (IV) (V) (I) Image (VI) The sulfonylimidocarbonic acid diesters of the formula IV and certain sulfonylisoureas of the formula VI, required as intermediates, are novel compounds. The process has the advantage that no sulfonamides are needed as intermediates.
439511
Kristinsson Haukur
Topfl Werner
Fetherstonhaugh & Co.
Novartis Ag
LandOfFree
Process for producing sulfonylureas having a herbicidal... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for producing sulfonylureas having a herbicidal..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for producing sulfonylureas having a herbicidal... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1316065