Method for producing anellated triazoles and new anellated triazoles and their use

US6525000B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Gerhard Hamprecht · Weinheim, DE
• Olaf Menke · Altleiningen, DE
• Robert Reinhard · Schifferstadt, DE
• Peter Schafer · Ottersheim, DE
• Cyrill Zagar · Ludwigshafen, DE
• Martina Otten · Ludwigshafen, DE
• Karl-Otto Westphalen · Speyer, DE
• Helmut Walter · Obrigheim, DE

Key dates

• Filing date: Dec 18, 2000
• Grant date: Feb 25, 2003
• Expiry date: Dec 18, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C275/40
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for preparing fused triazoles of formula I where:X—X is C—O, C—S, C—SO, C—SO2, or C—NR1;V is C═W2, R1R2C—C(═W2)— or C(═V2)—C(═W2);W1, W2 are oxygen or sulfur;which comprises reacting substituted N-aminoureas are reacted with formaldehyde or paraformaldehyde to give the corresponding methyleneimino ureas; cyclizing these in the presence of catalytic amounts of acid or metal oxide to give tetrahydro-4H-1,3,4-oxa(or thia)diazines, and cyclizing the fused triazoles using phosgene or a phosgene substitute. Also disclosed are novel fused triazoles of the formula I′