Tromethamine organocatalyzed efficient tandem-multicomponent synthesis of new thiazolyl-4-thiazolidinones in aqueous medium

Regioselective installation of enolizable ketones and unprotected mercaptoacetic acid into olefins using GO as a phase transfer catalyst

Unprecedented regioselective conjugate addition of enolizable ketones and unprotected mercaptoacetic acid to electron poor alkenes using GO as a phase transfer catalyst is reported in excellent yield of products (up to 92%) and recyclability of the catalyst up to five times.

An Efficient One-Pot, Multicomponent Synthesis of 1, 3-Thiazolidin-4- Ones Using L-Proline as Catalyst in Water

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An efficient methodology for the synthesis of 1,3-thiazolidin-4-ones using L-Proline as catalyst under aqueous conditions has been developed. The one-pot, multicomponent reaction of aromatic/heterocyclic aldehyde, aromatic amine and thioglycolic acid at room temperature give 1,3-thiazolidin-4-ones in moderate to good yields. Further, the current approach is notably greener than traditional methods with E-factor of 3.1 and the eco scale score of 96. The developed protocol offers several features, such as being simple, environmentally benign, energy-efficient, economical, mild conditions, shorter reaction time.