Process for the preparation of sulfonylureas

US5374725A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Gunter Schlegel · Liederbach, DE
• Hilmar Mildenberger · Kelkheim, DE

Key dates

• Filing date: Feb 22, 1994
• Grant date: Dec 20, 1994
• Expiry date: Feb 22, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C333/12
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A compound of formula I or salt thereof can be prepared in a process which comprises reacting a compound of formula II with a compound of formula III: ##STR1## wherein the formulae I-III the radical X is O, ONR.sup.2 or SO.sub.2 NR.sup.2 ; Y is N or CH; PA1 R.sup.1 is (subst.) alkyl, (subst.) alkenyl, (subst.) alkynyl, or in case X.dbd.O, also (subst.) phenyl; PA1 R.sup.2 is H, alkyl, alkenyl, alkynyl or cycloalkyl, PA1 R.sup.3 -R.sup.6 are defined in claim 1; PA1 Z is S or NR.sup.8 ; R.sup.7, R.sup.8 are H, alkyl, (subst.) phenyl or (subst.) benzyl, or, in case Z.dbd.NR.sup.8, R.sup.7 and NR.sup.8 are also a 5- to 7-membered heterocycle.