Process for the preparation of 5-membered nitrogen containing heteroaromatics

US5075452A · kind A · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Richard Kirchlechner
• Michael Casutt · Pfungstadt, DE
• Arno Basedow · Bad Vilbel, DE

Key dates

• Filing date: Dec 6, 1989
• Grant date: Dec 24, 1991
• Expiry date: Dec 6, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D233/90
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Compounds of the formula I ##STR1## in which A and X.sup.1 have the meaning given in patent claim 1 can be prepared in a simple manner, in a one-pot process and in high yields.