Process for the manufacture of fused piperazin-2-one derivatives

USRE43115E1 · kind E1 · reissue

Assignee

• Boehringer Ingelheim International GmbH · DE

Inventors

• Adil Duran · Biberach an der Riß, DE
• Guenter Linz · Mittelbiberach, DE

Key dates

• Filing date: Aug 5, 2010
• Grant date: Jan 17, 2012
• Expiry date: Aug 5, 2030

Classification

• Technology area (CPC —): General

Abstract

Disclosed are processes for the preparation of fused piperazin-2-one derivatives of general formula (I)wherein the groups R1 to R5, A1 and A2 have the meanings given in the claims and in the description, particularly the preparation of 7,8-dihydro-5H-pteridin-6-one derivatives and intermediates thereof.