R. Giovannini et M. Petrini, SYNTHESIS AND RADICAL CYCLIZATION OF 2-ALLYLAMINO-3-CHLOROPROPYLPHENYL SULFONES TO 2,4-DISUBSTITUTED PYRROLIDINES, Synlett, (1), 1998, pp. 90
Allylic and propargylic amines give a chemoselective conjugate additio
n to 3-chlorovinyl surfones under appropriate conditions. The resultin
g allylamino sulfones are cyclized using tributyltin hydride to afford
2,4-disubstitued pyrrolidines in satisfactory yield.