SYNTHESIS OF 2H-1-BENZOPYRAN-2,4(3H)-DIONE-3-CARBOXAMIDE AND ANO[4,3-B]PYRANO-2-HYDROXY-3-CARBOXAMIDE-4,5-DIONE DERIVATIVES VIA CARBON SUBOXIDE

Authors
BONSIGNORE L LOY G
Citation
L. Bonsignore et G. Loy, SYNTHESIS OF 2H-1-BENZOPYRAN-2,4(3H)-DIONE-3-CARBOXAMIDE AND ANO[4,3-B]PYRANO-2-HYDROXY-3-CARBOXAMIDE-4,5-DIONE DERIVATIVES VIA CARBON SUBOXIDE, Heterocycles, 45(11), 1997, pp. 2131-2136
Citations number
15
Journal title
Heterocycles → ACNP
ISSN journal
03855414
Volume
45
Issue
11
Year of publication
1997
Pages
2131 - 2136
Database
ISI
SICI code
0385-5414(1997)45:11<2131:SO2AA>2.0.ZU;2-Q
Abstract
The reaction of substituted 2-hydroxybenzamides with carbon suboxide i s described. By varying the weight ratio of the reagent, this reaction leads to the coumarin and/or pyranocoumarin derivatives in one step a nd with satisfactory yields.