BENZOPYRANS .35. REACTION OF 4-OXO-4H-1-BENZOPYRAN-3-CARBOXYLIC ACID AND ITS METHYL-ESTER WITH DIAZOMETHANE

Authors
GHOSH CK SAHANA S GHOSH C
Citation
Ck. Ghosh et al., BENZOPYRANS .35. REACTION OF 4-OXO-4H-1-BENZOPYRAN-3-CARBOXYLIC ACID AND ITS METHYL-ESTER WITH DIAZOMETHANE, Indian journal of chemistry. Sect. B: organic chemistry, including medical chemistry, 35(7), 1996, pp. 669-672
Citations number
17
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Indian journal of chemistry. Sect. B: organic chemistry, including medical chemistry → ACNP
ISSN journal
03764699
Volume
35
Issue
7
Year of publication
1996
Pages
669 - 672
Database
ISI
SICI code
0376-4699(1996)35:7<669:B.RO4A>2.0.ZU;2-N
Abstract
The title acid 2 on treatment with diazomethane gives furobenzopyran 5 cyclopropane 8 and the pyrazoles 11-13 whereas methyl 4-oxo-4H-1-bent opyran-3-carboxylate (1) gives its 2-methyl homologue and 8. Compound 8 on heating with methanol yields benzoxepin 9.