Australian Journal of Chemistry Australian Journal of Chemistry Society
An international journal for chemical science

The cyclization of some methylphenylhydrazones to indoles. The preparation of some polymethine dyes related to Astrazon Orange R

DJ Gale, J Lin and JFK Wilshire

Australian Journal of Chemistry 29(12) 2747 - 2751
Published: 1976


The cyclization of several substituted acetophenone methylphenylhydrazones to indoles has been achieved by means of polyphosphoric acid as the reagent. The resultant N-methyl-2- phenylindoles and their 3-formyl analogues were used for the preparation of several new polymethine basic dyes related to Astrazon Orange R, the ultraviolet spectral and lightfastness (on wool) properties of which are described. The cyclization of some cycloalkanone methylphenylhydrazones has been achieved in acetic acid.

© CSIRO 1976

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