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Year 2007, Month 10 (Section Full Articles, Page 2085)

Pyrylium salts in the synthesis of 2-pyrazoline derivatives and earlier unknown substituted 3,3a,4,7-tetrahydropyrazolo[1,5-a]pyridin-7-ones

L. Yu. Ukhin

New 1,3,5-substituted 2-pyrazoline derivatives were synthesized from 2,6-diphenylpyrylium perchlorate and acylhydrazines. Method for the synthesis of earlier unknown 3,3а,4,7-tetrahydropyrazolo[1,5-a]pyridin-7-one derivatives from pyrylium salts and cyanoacetic acid hydrazide was proposed.

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