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Synthesis of new pyrazolo[1,5-a]pyrimidines

✍ Scribed by D. V. Kryl’skii; A. S. Chuvashlev; A. P. Arzamastsev; A. I. Slivkin

Publisher
Springer
Year
2009
Tongue
English
Weight
83 KB
Volume
43
Category
Article
ISSN
0091-150X

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## Abstract While 3(5)‐aminopyrazole reacts with enaminonitrile to yield pyrazolo[1,5‐__a__]pyrimidines, 3‐amino‐5‐pyrazolone reacts with the same reagents to yields pyrazolo[3,4‐__b__]pyridines.

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A convenient, rapid, and highly selective method for synthesis of new pyrazolo[1,5-a]pyrimidines via the reaction of enaminones and 5-amino-1H-pyrazoles under microwave irradiation
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## Abstract Twelve new 7‐aryl‐3‐cyanopyrazolo[1,5‐__a__]pyrimidines (**3a‐f**) and ethyl 7‐arylpyrazolo[1,5‐__a__]pyrimidine‐3‐carboxylates (**3g‐l**) have been conveniently synthesized by the reaction of enaminones with 5‐amino‐1__H__‐pyrazoles in good yields under microwave irradiation. With one