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Participation of Molecular Oxygen in Cyclization of 5-Arylmethyleneamino-4-(3,4-dimethoxyphenyl)pyrazoles

✍ Scribed by S.L. Bogza; S.Yu. Suikov; V.I. Dulenko; M.G. Kasyanchuk; I.A. Opeida

Book ID
110349933
Publisher
SP MAIK Nauka/Interperiodica
Year
2002
Tongue
English
Weight
25 KB
Volume
38
Category
Article
ISSN
1070-4280

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## Abstract The 1__H__‐pyrazole‐3‐carboxylic acid 2 or its remarkably stable acid chloride 3 can easily be converted into the corresponding ester or amide derivatives 4 or 5, respectively, from reaction with alcohols or __N__‐nucleophiles. Pyrazolo[3,4‐__d__]pyridazines 6a,b are obtained from cyclo