Synthetic methodology for alkyl substituted hydrazines

Substituted hydrazines have found many technical and commercial application s and this is reflected in the immense number of such compounds synthesized to date. In this review an attempt has been made to supplement the existin g comprehensive literature by presenting only a selection of synthetic meth ods, judged to be of particular principal or practical interest, together w ith some additional, recent approaches. The important steps in the developm ent from simple substituted hydrazines to rational synthesis of multisubsti tuted derivatives are recapitulated.