Abstract
The article describes an efficient and environmentally friendly Michael addition of 2-[(2-oxo-2-phenylethyl)sulfanyl]-1-phenyl-1-ethanones (diphenacyl sulfides) to substituted chalcones using microwave irradiation under solvent-free conditions, affording differently substituted 1,3,5-triarylpentan-1,5-diones in moderate to good yields of 74–83%.
GRAPHICAL ABSTRACT
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ACKNOWLEDGMENTS
The authors thank the Department of Science and Technology for funds under the IRHPA program used for the high-resolution NMR spectrometer. Financial support from the University Grants Commission, New Delhi, to N.P. is gratefully acknowledged.
Notes
a No recognizable product was isolated.
b Separation through wash column.
c After recrystallization from ethanol-ethyl acetate mixture.
a Recrystallization from ethanol–ethyl acetate mixture.
b Separation through wash column.
c Purified through column chromatography.