Arenesulfonylhydrazones are exceedingly important intermediates in organic synthesis, considering their triple role as precursors of diazo compounds and carbenes, 1'2 activating groups for regiospecific alkylation^,^ and synthons for vinyl carbanions and the derived 01efins.~ As a necessary part of our investigation of synthetically useful additions to the CN double bond of arenesulfonylhydrazones? we have prepared a number of these ...
