I. Yavari, R. Hekmatshoar, A. Zonouzi
Apr 16, 1998
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0
Influential Citations
213
Citations
Quality indicators
Journal
Tetrahedron Letters
Abstract
Abstract Protonation of the reactive 1:1 intermediate produced in the reaction between triphenylphosphine and dimethyl acetylenedicarboxylate by substituted phenols leads to a vinyltriphenylphosphonium salt, which undergoes aromatic electrophilic substitution reaction with the phenolate conjugate base to produce 4-carboxymethylcoumarins in fairly high yields.