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Base‐promoted reaction of a hydrazonyl chloride with 1‐phenylsulphonylpropyne
Author(s) -
Bruché Luca,
Zecchi Gaetano
Publication year - 1983
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.5570200652
Subject(s) - chemistry , triethylamine , nitrile , imine , base (topology) , chloride , medicinal chemistry , pyrazole , organic chemistry , catalysis , mathematical analysis , mathematics
Treatment of methyl 2‐chloro‐2‐phenylhydrazonoacetate (1) with 1‐phenylsulphonylpropyne (3) in the presence of triethylamine gives pyrazole derivatives due to cycloadditions of a nitrile imine intermediate with 3 and with its rearranged product phenylsulphonylallene (4).