BACKGROUND: ALK(YN)YL IMINES REPRESENT AN IMPORTANT CLASS OF FUNCTIONALIZED ALK(YN)ES BECAUSE OF THEIR APPLICATIONS IN THE S(YN)THESIS OF A BROAD RANGE OF BIOLOGICALLY IMPORTANT COMPOUNDS. ALK(YN)YL IMINES ARE VERSATILE INTERMEDIATES, WHICH ARE USED TO S(YN)THESIZE MANY DIFFERENT KINDS OF HETEROCYCLES, SUCH AS PYRROLES [1] QUINOLINES, PYRIDINES AND OTHERS [2]. FURTHERMORE, THEY CAN ALSO REACT WITH CONJUGATED DIENE TO GIVE BICYCLIC COMPOUNDS.METHODS: HEREIN, WE REPORT A SIMPLE AND EFFICIENT PROCEDURES FOR THE S(YN)THESIS OF SULFONYL-(YN)-IMINE VIA THE CU-CATALYZED THREE-COMPONENT COUPLING REACTION OF TRICHLOROACETONITRILE, SODIUM ARYLSULFINATES AND TERMINAL ALK(YN)ES [3].RESULTS: AT FIRST, PHENYLACETYLENE 1, TRICHLOROACETONITRILE 2 AND SODIUM ARYLSULFINATES 3 WERE SELECTED AS THE MODEL SUBSTRATES. SEVERAL CATALYSTS SUCH AS CUI, CUBR, CUCL, AND COPPER POWDER WERE TESTED WITH CUI GIVING THE BEST RESULTS. AMONG SEVERAL SOLVENTS SCREENED, (DMF) WAS THE BEST. WHEN THE REACTION WAS PERFORMED IN DMF IN THE PRESENCE OF 1 EQUIV OF TRIETHYLAMINE AT ROOM TEMPERATURE FOR 12 H, IT WAS FOUND THAT THE DESIRED PRODUCT 5 WAS INDEED OBTAINED 80% YIELD.