Abstract A series of N-(tosylmethyl) imino compounds [TosCH 2 N [DOUBLE BOND] C (L) A] has been prepared, and applied to a new, base-induced, one-operational synthesis of otherwise more difficultly accessible 2, 3, 4-trisubstituted pyrroles from electron deficient olefins. This regiospecific process probably is an 1, 3-anionic cycloaddition, combined with the elimination of sulfinic acid and a leaving group L. The group A is retained as the 2- ...
