Synthesis and Structure of Substituted 2-Amino-3-arylindoles.

The corresponding 2-amino-3-arylindole hydrochlorides were obtained by the reaction of substituted arylacetic acid arylhydrazides with phosphorus oxychloride (the Kost reaction). The effect of substituents in the aryl rings on the rearrangement was examined qualitatively. The IR, PMR, and UV spectra of the compounds obtained are discussed in relationship with the peculiarities of their structure.