Patent · US Expired

Method for making certain pyrano[3',4':6,7]indolizino-[1,2-B]quinolinones

US5155225A · kind A · utility

10Cited by

0References

5Claims

0Family size

Assignee

SmithKline Beecham Limited · US

Inventors

Joseph M. Fortunak · Newark, US
Mark Mellinger · Fort Lauderdale, US
Jeffery Lee Wood · King of Prussia, US

Key dates

Filing date	Sep 28, 1990
Grant date	Oct 13, 1992
Priority date	—
Expiry date	Sep 28, 2010

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D471/14
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A method for making 8-methyl-7-(1-oxopropyl)indolizino[1,2-b]quinolin-9(11H)-ones from 4-ethyl-4-hydroxy-1H-pyrano[3',4':6,7]indolizino[1,2-b]quinolin-3,14(4H,12 H)-diones, said method being graphically illustrated as follows: ##STR1##

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.