New derivatives of 3-aminoindole. Synthesis of 2-aryl(hetaryl)-3-(3,5-dimethyl-1-pyrazolyl)indoles

摘要

The interaction of arylhydrazines with ω-(3,5-dimethyl-1-pyrazolyl)acetophenones and acetyl(2-thiophene) leads to arylhydrazones, which are converted by Fischer cyclization into 2-aryl(thienyl)-3-(3,3-dimethyl-1-pyrazolyl)indoles with substituents in positions 1, 5, and 7.