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New Routes for Novel Pyrazolo[3,4-b][1,6]-naphthyridine, Pyrazolo[3,4-b]pyridine and Pyrazolo[3,4:2,3]pyrido[6,1-a]benzimidazole Derivatives

✍ Scribed by Latif, Fawi M. Abd El; Barsy, Magda A.; Elrady, Eman A.; Hassan, M.

Book ID
121318806
Publisher
Science Reviews 2000 Ltd
Year
1999
Tongue
English
Weight
121 KB
Volume
12
Category
Article
ISSN
0308-2342

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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.

A convenient route for the synthesis of
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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]-[