A Rh-catalyzed 1,2-sulfur migration/aza-Diels-Alder cascade initiated by aza-vinyl carbenoids from sulfur-tethered N-sulfonyl-1,2,3-triazoles

A novel Rh(II) catalyzed intramolecular 1,2-sulfur rearrangement/inter-molecular aza-Diels-Alder cascade initiated by azavinyl carbenes has been developed, efficiently affording sulfur-containing tetrahydropyridine derivatives or a, b-unsaturated imines with a broad substrate scope.