Author/Authors :
Perin، نويسنده , , Gelson and Jacob، نويسنده , , Raquel G. and de Azambuja، نويسنده , , Francisco and Botteselle، نويسنده , , Giancarlo V. and Siqueira، نويسنده , , Geonir M. and Freitag، نويسنده , , Rogério A. and Lenardمo، نويسنده , , Eder J.، نويسنده ,
Abstract :
A simple, clean, and efficient solvent-free protocol was developed for hydrochalcogenation of methyl propiolate derivatives with phenylchalcogenolate anion generated in situ from the respective diphenyl dichalcogenide (S, Se, Te) using alumina supported sodium borohydride. This efficient and improved method is general and furnishes the (Z)-β-phenylchalcogeno-α,β-unsaturated esters in yields and with selectivity comparable to those using organic solvent and inert atmosphere. The use of MW irradiation facilitates the procedure and accelerates the reaction.
