A One-Pot Synthesis of Thiopyrane Derivatives from Ketene S,S-Acetals and α,β-Unsaturated Nitriles Under Ptc Conditions

Some new functionally substituted thiopyranes and 1,3-dithiolanes were obtained in a one-pot reaction using phase transfer catalysis conditions (PTC) starting with some active methylene compounds, carbon disulphide or phenyl isothiocyanate and α,β-unsaturated nitriles. The structure of the new compounds was assigned.