Synthesis of 2-Alkylidenethiazolidine-4,5-diones and 2-Alkylideneoxazolidine-4,5-diones by One-Pot Cyclization of Arylacetonitriles with Heterocumulenes and Ethyl 2-Chloro-2-oxoacetate - Albrecht, Uwe; Langer, Peter (Synlett, 2004)