Asymmetrically substituted xanthines

US5719279A · kind A · utility

Assignee

• Boehringer Ingelheim GmbH · DE

Inventors

• Ulrike Kufner-Muhl · Mainz, DE
• Helmut Ensinger · Wackernheim, DE
• Joachim Mierau · Mainz, DE
• Franz J. Kuhn · Gau-Algesheim, DE
• Erich Lehr · Waldalgesheim, DE
• Enzio Muller · Bad Kötzting, DE

Key dates

• Filing date: Jun 11, 1996
• Grant date: Feb 17, 1998
• Expiry date: Jun 11, 2016

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61P25/28
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Xanthine derivatives of formula ##STR1## wherein R.sub.1 is hydrogen, alkyl or alkynyl, R.sub.2 is different and is alkyl, alkynyl, phenyl-alkylene, phenyl alkenylene, cycloalkyl, inter alia, R.sub.3 is cycloalkyl, phenyl, norbornane, inter alia and R.sub.4 is hydrogen, methyl, benzyl, inter alia.