4H-1-benzopyran-4-one compounds which have anti-inflamatory or immunodulating action

US4900727A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Samba Laxminarayan Kattige · Yellandu, IN
• Ramchandra G. Naik · Yellandu, IN
• Aftab D. Lakdawalla · Yellandu, IN
• Alihussein N. Dohadwalla · Yellandu, IN
• Richard H. Rupp · Königstein, DE
• Noel De Souza · Mumbai, IN

Key dates

• Filing date: Jan 26, 1989
• Grant date: Feb 13, 1990
• Expiry date: Jan 26, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D405/14
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to novel 4H-1-benzopyran-4-one derivatives, to processes for the preparation thereof and to their use as anti-inflammatory, analgesic, immuno-suppressive and anti-allergic agents. In particular, the present invention relates to novel compounds of the formula I, ##STR1## in which R.sub.1 is hydrogen, alkyl having 1 to 6 carbon atoms, arly-C.sub.1 -C.sub.4 -alkyl, substituted C.sub.1 -C.sub.6 -alkyl, C.sub.3 -C.sub.6 -cycloalkyl, C.sub.3 -C.sub.6 -cycloalkyl-C.sub.1 -C.sub.4 -alkyl, C.sub.2 -C.sub.6 -alkenyl, C.sub.3 -C.sub.6 -alkynyl, aryl or carboxyl or an aldehyde or COO--C.sub.1 -C.sub.4 -alkyl group, R.sub.2 is hydrogen, alkyl having 1 to 6 carbon atoms, nitro, amino, di-C.sub.1 -C.sub.4 -alkylamino or a halogen, R.sub.3 is C.sub.1 -C.sub.4 -alkyl, substituted C.sub.1 -C.sub.4 -alkyl, hydroxyl, C.sub.1 -C.sub.4 -alkoxy, aryl-C.sub.1 -C.sub.4 -alkyl, nitro, amino, a C.sub.1 -C.sub.4 -alkylamino or di-C.sub.1 -C.sub.4 -alkylamino group or halogen, R.sub.4 is hydrogen, hydroxyl, C.sub.1 -C.sub.4 -alkyoxy, C.sub.1 -C.sub.4 -alkyoxycarbonyl, aryloxy, amino or a C.sub.1 -C.sub.4 -alkylamino or di-C.sub.1 -C.sub.4 -alkylamino group, R.sub.5 is hydrogen, C.…