Alkynyl propargyl sulfones underwent secondary amine-induced cyclization to give six-membered cyclic enaminosulfones, and the products were subjected to acidic hydrolysis to afford the corresponding cyclic β-ketosulfones in high yields. Click to show full abstract
Alkynyl propargyl sulfones underwent secondary amine-induced cyclization to give six-membered cyclic enaminosulfones, and the products were subjected to acidic hydrolysis to afford the corresponding cyclic β-ketosulfones in high yields.
               
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