Vinyltriphenylphosphonium salt mediated synthesis of functionalized coumarins

Authors
Yavari, I Adib, M Hojabri, L
Citation
I. Yavari et al., Vinyltriphenylphosphonium salt mediated synthesis of functionalized coumarins, TETRAHEDRON, 57(35), 2001, pp. 7537-7540
Citations number
14
Categorie Soggetti
Chemistry & Analysis","Organic Chemistry/Polymer Science
Journal title
TETRAHEDRON
ISSN journal
00404020 → ACNP
Volume
57
Issue
35
Year of publication
2001
Pages
7537 - 7540
Database
ISI
SICI code
0040-4020(20010827)57:35<7537:VSMSOF>2.0.ZU;2-O
Abstract
Protonation of the reactive 1:1 intermediate produced in the reaction betwe en triphenylphosphine and dimethyl acetylenedicarboxylate by hydroquinone, resorcinol, catechol or pyrogallol leads to vinylphosphonium salts, which u ndergo Michael addition with the conjugate base of the hydroxy acid to prod uce highly functionalized 2-oxo-2H-chromene derivatives in good yields. (C) 2001 Elsevier Science Ltd. All rights reserved.