Author:
Dennler E. B.,Frasca A. R.
Abstract
Several heterocycles with fused pyrazole rings were obtained by treatment of the p-nitrophenylhydrazones of several acylated hydrocarbons and thiophene with polyphosphoric acid.
Publisher
Canadian Science Publishing
Subject
Organic Chemistry,General Chemistry,Catalysis
Cited by
20 articles.
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2. Indazoles: Synthesis and Bond-Forming Heterocyclization;Advances in Heterocyclic Chemistry;2018
3. The Structure ofN-phenyl-pyrazoles and Indazoles: Mononitro, Dinitro, and Trinitro Derivatives;Journal of Heterocyclic Chemistry;2017-11-07
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5. Cyclization of 2,6-dialkoxy acetophenone hydrazones in the presence of polyphosphoric acid (PPA);Chinese Journal of Chemistry;2010-08-27