Substituted pyrazolo[3,4-d]pyrimidin-4-one compounds as phosphodiesterase inhibitors

US8039477B2 · kind B2 · utility

Assignee

• Boehringer Ingelheim International GmbH · DE

Inventors

• Martin Hendrix · Tarrytown, US
• Frank-Gerhard Böβ · Grafton, GB
• Nils Burkhardt · Velbert, DE
• Christina Erb · Wiesbaden, DE
• Adrian Tersteegen · Wuppertal, DE
• Marja Van Kampen · Neu-Isenburg, DE

Key dates

• Filing date: Aug 13, 2003
• Grant date: Oct 18, 2011
• Expiry date: Sep 2, 2025

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61P43/00
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

The invention relates to novel alkyl-substituted pyrazolopyrimidines, process for their preparation, and the use thereof for producing medicaments for improving perception, concentration, learning and/or memory with compounds of formula (I):