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N‐1 Substituted ethyl 4‐pyrazolecarboxylates: Synthesis and spectroscopic investigations
Author(s) -
Holzer Wolfgang,
Seiringer Gertrud
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.5570300404
Subject(s) - chemistry , ethyl ester , propionate , organic chemistry , proton nmr
The synthesis of various N‐1 substituted ethyl 4‐pyrazolecarboxylates via reaction of ethyl 2‐formyl‐3‐oxo‐propionate (= ethoxycarbonylmalondialdehyde) with appropriately substituted hydrazines is described. Moreover, detailed nmr‐spectroscopic investigations with the title compounds are presented.