Abstract
The domino reactions of (Z,Z)-2,2′-thiobis(1,3-diarylprop-2-en-1-ones) with acetylacetone and ethyl acetoacetate in the presence of sodium ethoxide afforded the corresponding 4,5-dihydrofurans stereoselectively in moderate yields presumably via a Michael addition–enolization–displacement sequence.
ACKNOWLEDGMENTS
S. R. and M. G. thank the University Grants Commission for the financial support under Major Research Project F. 31-96/2005 (SR). S. R. and M. G. also thank the secretary and the principal, Fatima College, Madurai, for providing facilities.
Notes
a The ratio of 1–ketone–NaOEt is 1:2:2.
b The ratio of 1–ketone–NaOEt is 1:1:1.
c Melting points of 3 agree with those reported in the literature.