REGIOSELECTIVE SYNTHESIS OF FURO[3,2-C][1]BENZOPYRAN-4-ONE AND FURO[3,2-C]QUINOLIN-4-ONE

Authors
MAJUMDAR KC BHATTACHARYYA T
Citation
Kc. Majumdar et T. Bhattacharyya, REGIOSELECTIVE SYNTHESIS OF FURO[3,2-C][1]BENZOPYRAN-4-ONE AND FURO[3,2-C]QUINOLIN-4-ONE, Journal of chemical research. Synopses, (7), 1997, pp. 244-245
Citations number
16
Categorie Soggetti
Chemistry
Journal title
Journal of chemical research. Synopses → ACNP
ISSN journal
03082342
Issue
7
Year of publication
1997
Pages
244 - 245
Database
ISI
SICI code
0308-2342(1997):7<244:RSOFAF>2.0.ZU;2-O
Abstract
4-hydroxycoumarins and 4-hydroxy-1-methyl-2-quinolone react with chlor oacetaldehyde in the presence of aqueous potassium carbonate to give 3 -hydroxy-2,3-dihydrofluro derivatives (60-75%) which on treatment with aqueous hydrochloric acid provide furo[3,2-c]coumarins and the hither to unreported 5-methylfuro[3,2-c]quinolin-4-one in nearly quantitative yields.