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Synthesis of 1‐aryl‐5‐chloro‐3‐(phenylsulfonyl)pyrazol‐4‐ols from 1,1‐dichloro‐3‐phenylsulfonyl‐2‐propanone
Author(s) -
Takahashi Masahiko,
Zheng Min,
Oshida Takeshi,
Narahara Kiyosi
Publication year - 1994
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.5570310134
Subject(s) - chemistry , sulfone , aryl , medicinal chemistry , organic chemistry , alkyl
1,1‐Dichloro‐3‐phenylsulfonyl‐2‐propanone was treated with arenediazonium chlorides to give 1‐arylhydrazono‐3,3‐dichloro‐1‐phenylsulfonyl‐2‐propanones, which were cyclized to 1‐aryl‐5‐chloro‐3‐(phenylsulfonyl)pyrazol‐4‐ols on treatmemt with base.