Ring transformations involving chloroheterocycles. Part II. Reaction of 4-chloro-1,8-naphthyridines and 4-chloroquinolines with substituted hydrazines
Abstract
4-Chloro-1,8-naphthyridines and 4-chloroquinolines rearrange on treatment with substituted hydrazines to yield 1,3-pyrazoles. The configuration of the pyrazoles was determined from n.m.r. studies. A mechanism for the rearrangement is proposed.