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Investigations for the Preparation of New Pyrazolo[4,3-d]isothiazole Derivatives.

✍ Scribed by Urszula Lipnicka; Izabela Jasztold-Howorko

Book ID
101976629
Publisher
John Wiley and Sons
Year
2005
Weight
19 KB
Volume
36
Category
Article
ISSN
0931-7597

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## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.

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FriedlΓ€nder condensation of 5-aminopyrazole-4-carbaldehydes 1 with formamide 2a or benzamide 2b gave pyrazolo [3,4-d]pyrimidine derivatives 3. Cyclocondensation of 1 with cyclopentanone, N-benzyl-4piperidone and 6-methoxy-1-tetralone yielded cyclopenta[b]pyrazolo[4,3-e]pyridines 4, pyrazolo[3,4-b]-[