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Convenient synthesis of 4‐trifluoroacetylpyrazoles from aldehyde tert ‐butylhydrazones
Author(s) -
Kamitori Yasuhiro,
Hojo Masaru,
Masuda Ryōichi,
Fujishiro Masaki,
Nakamura Isao,
Yamamoto Katsumasa
Publication year - 1993
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.5570300217
Subject(s) - chemistry , aldehyde , combinatorial chemistry , organic chemistry , catalysis
Several 1‐( tert ‐butyl)‐4‐trifluoroacetylpyrazoles 3 were synthesized by the reaction of aldehyde tert ‐butylhy‐drazones 2 with 4‐ethoxy‐1,1,1‐trifluoro‐3‐buten‐2‐one ( 1 ). The tert ‐butyl group could be readily removed by treatment of 3 with 90% sulfuric acid.