Keywords
atom economy
C–S bond formation
deep eutectic solvent
green chemistry.
sulfides
thia-Michael addition
α
β-unsaturated carbonyl compounds
Abstract
A 100% atom-efficient thia-Michael addition process between thiols and α,β -unsaturated carbonyl compounds in a Bronsted acidic deep eutectic solvent at room temperature has been developed. The medium, choline chloride/p-toluene- sulfonic acid, not only showed good catalytic activity, but also could be readily recovered and reused with slight decrease in its activity after successive five runs.
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