Method for preparing substituted 5-amino-N-phenyl-1,2,4-triazole-3-sulfonamides

US6680388B2 · kind B2 · utility

Assignee

• BAYER CROPSCIENCE AKTIENGESELLSCHAFT · DE

Inventors

• Christian Beier · Bensberg, DE
• Reinhard Lantzsch · Leverkusen, DE

Key dates

• Filing date: Dec 12, 2002
• Grant date: Jan 20, 2004
• Expiry date: Dec 12, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D249/14
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for preparing 5-amino-N-phenyl-1,2,4-triazole-3-sulfonamides of the formula (I) whereX is halogen, cyano or nitro,R is hydrogen or optionally halogen-substituted C1-C4-alkyl, andn is 1 or 2,by reacting 5-amino-3-chlorosulfonyl-1,2,4-triazole of the formula (II) with substituted anilines of the formula (III) where X, n and R are as defined for formula (I), in the absence of a solvent.