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Silver(i)/base-promoted propargyl alcohol-controlled regio- or stereoselective synthesis of furan-3-carboxamides and (Z)-enaminones†
Sabera Sultana,Jae-Jin Shim,Sung Hong Kim,Yong Rok Lee
Organic & Biomolecular Chemistry Pub Date : 09/06/2018 00:00:00 , DOI:10.1039/C8OB01791C
Abstract

A novel and facile regioselective synthesis of furan-3-carboxamides by a silver(I)/base-promoted reaction of propargyl alcohol with 3-oxo amides has been demonstrated. This one-pot protocol provides a rapid synthetic approach to diverse trisubstituted furan-3-carboxamides via cascade nucleophilic addition, intramolecular cyclization, elimination, and isomerization reactions. Employing a substituted propargyl alcohol, (Z)-enaminones have been obtained with high stereoselectivities by a Ag2CO3-promoted reaction starting from 3-oxo amides via C–N bond cleavage.

Graphical abstract: Silver(i)/base-promoted propargyl alcohol-controlled regio- or stereoselective synthesis of furan-3-carboxamides and (Z)-enaminones
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