The invention relates to thiazolidine derivatives having in 4-position a hydroxy group and a 3'-sulphamyl-phenyl substituent, in 2-position an imino group and in 1-position an aliphatic or cycloaliphatic substituent. Said thiazolidines have diuretic activity. The invention also relates to a process for the manufacture of said compounds.
A simple and efficient method for constructing thiohydantoin heterocycles using a phosphine-catalyzed tandem umpolung addition and intramolecular cyclization of thioureas on arylpropiolates is described.