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Synthesis of 5-amino-4, 5-dihydropyrazolo [3,4-d] pyrimidin-4-ones and related isomeric systems : Part I. Synthesis and characterization of potential intermediates

✍ Scribed by A. Maquestiau; J.-J. Vanden Eynde

Book ID
104203022
Publisher
Elsevier Science
Year
1987
Tongue
French
Weight
572 KB
Volume
43
Category
Article
ISSN
0040-4020

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✦ Synopsis

Reactions between aminopyrazole-4-carboxylic acids derivatives and orthoesters or amide acetals lead, in most cases, to the introduction of a heteroalkylidene moiety on the amino group of ethyl aminopyrazole-4-carboxylates and on the p-hydrazide nitrogen atom of aminopyrazole-4-carboxhydrazides.

Several factors governing the course of these reactions are discussed.

πŸ“œ SIMILAR VOLUMES

Synthesis of 5-amino-4,5-dihydropyrazolo
Synthesis of 5-amino-4,5-dihydropyrazolo [3,4-d] pyrimidin-4-ones and related isomeric systems : Part II. Ring closure reactions
✍ A. Maqestiau; J.-J. Vanden Eynde πŸ“‚ Article πŸ“… 1987 πŸ› Elsevier Science 🌐 French βš– 432 KB

Abstrat -Treatment of ethyl (heteroalkylidene)aminopyrazole-4-carboxylates with hydrazine hydrate generally provides a ready synthetic route to 5-amino-4,5-dihydropyrazolo [3.4-d] pyrimidin-4-ones, although ethyl 5-[(dimethylamino)alkylidene]aminopyrazole-4-carboxylates are unreactive. On the other

Facile Synthesis of Pyrazolo[3,4-d]pyrim
Facile Synthesis of Pyrazolo[3,4-d]pyrimidines and Pyrimido[4,5-d]pyrimidin-4-one Derivatives.
✍ Sanjay Babu Katiyar; Arun Kumar; Prem M. S. Chauhan πŸ“‚ Article πŸ“… 2007 πŸ› John Wiley and Sons βš– 24 KB πŸ‘ 1 views

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