Synthesis of furocoumarins via rhodium(II)-catalysed heterocyclisation of 3-diazobenzopyran-2,4(3H)-dione with terminal alkynes

Authors
Tollari, S Palmisano, G Cenini, S Cravotto, G Giovenzana, GB Penoni, A
Citation
S. Tollari et al., Synthesis of furocoumarins via rhodium(II)-catalysed heterocyclisation of 3-diazobenzopyran-2,4(3H)-dione with terminal alkynes, SYNTHESIS-S, (5), 2001, pp. 735-740
Citations number
43
Categorie Soggetti
Chemistry & Analysis","Organic Chemistry/Polymer Science
Journal title
SYNTHESIS-STUTTGART
ISSN journal
00397881 → ACNP
Issue
5
Year of publication
2001
Pages
735 - 740
Database
ISI
SICI code
0039-7881(200104):5<735:SOFVRH>2.0.ZU;2-M
Abstract
The rhodium (II) acetate-catalysed decomposition of 3-diazobenzopyran-2,4(3 H)-dione in the presence of a terminal alkyne gave rise to a mixture of iso meric 2-substituted furo[3,2-c]coumarin and furo[2,3-b]coumarin, resulting from a formal [3+2] cycloaddition.