Silver-mediated synthesis of 1,4-dihydropyridine sulfones via [4 + 2] cyclization of N-allenylsulfonamides and enaminones with a 1,3-sulfonyl shift

A [4 + 2] cyclization reaction of N -allenylsulfonamides and enaminones towards unsymmetrical 1,4-dihydropyridine sulfones with a 1,3-sulfonyl shift was reported and simple operation for diversification was also achieved.