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Reactions with heterocyclic amidines. VI. Synthesis and chemistry of pyrazol‐5‐yl, and 1,2,4‐triazol‐5‐ylhydrazonyl chlorides
Author(s) -
Elnagdi Mohamed Hilmy,
Elmoghayer Mohamed Riffaat Hamza,
Elfaham Hassan Attia,
Sallam Mohamed Mohamed,
Alnima Hikmat Hussein
Publication year - 1980
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.5570170201
Subject(s) - chemistry , acetylacetone , medicinal chemistry , 1,2,4 triazole , organic chemistry
Abstract The 4‐bromo‐3‐phenylpyrazol‐5‐ylhydrazonyl chlorides (Ia,b) and 1,2,4‐triazol‐5‐ylhydrazonyl chlorides (IIa,b) were prepared via coupling of diazotized 4‐bromo‐3‐phenyl‐5‐aminopyrazole (III) and 5‐amino‐1,2,4‐triazole (IV) with α‐chloro derivatives of acetylacetone and of ethyl aceto‐acetate. Compounds Ia and IIa,b were utilised for the synthesis of several new heterocyclic derivatives.