BENZOPYRANS - PART 38 - REACTIONS OF 4-OXO-4H-1-BENZOPYRAN-3-CARBALDEHYDE, 4-OXO-4H-1-BENZOPYRAN-3-CARBONITRILE AND 4-OXO-4H-1-BENZOPYRAN-3-CARBOXYLATE WITH CHLOROACETONE AND A NOTE ON THE STEREOCHEMISTRY OF BENZO[B]CYCLOPROPA[E]PYRANS

Authors
GHOSH CK BHATTACHARYYA S GHOSHAL N ACHARI B
Citation
Ck. Ghosh et al., BENZOPYRANS - PART 38 - REACTIONS OF 4-OXO-4H-1-BENZOPYRAN-3-CARBALDEHYDE, 4-OXO-4H-1-BENZOPYRAN-3-CARBONITRILE AND 4-OXO-4H-1-BENZOPYRAN-3-CARBOXYLATE WITH CHLOROACETONE AND A NOTE ON THE STEREOCHEMISTRY OF BENZO[B]CYCLOPROPA[E]PYRANS, Journal of chemical research. Synopses, (4), 1998, pp. 178-179
Citations number
24
Categorie Soggetti
Chemistry
Journal title
Journal of chemical research. Synopses → ACNP
ISSN journal
03082342
Issue
4
Year of publication
1998
Pages
178 - 179
Database
ISI
SICI code
0308-2342(1998):4<178:B-P3-R>2.0.ZU;2-E
Abstract
The title benzopyranones 1-3 give the benzo[b]furan 7 and the benzo[b] cyclopropa [e] pyrans 8 and 9 with chloroacetone in acetone containing anhydrous potassium carbonate and a catalytic amount of potassium iod ide but give the 1-benzopyranones 10, 11 and 14 in dichloromethane in the presence of Brockman neutral alumina, respectively.