Reactions of 1-substituted 8-hydrazinotheobromines with Dicarbonyl Compounds

Romanenko, N. I.; Иванченко, Д. Г.; Sharapova, T. A.; Пахомова, О. А.; Korzhova, A. S.

doi:10.1007/s10600-014-1160-0

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2015

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“…Interaction of hydrazinoxantines 10-18 with the excess of acetoacetic ester in glacial acetic acid takes place with the formation of new derivatives of heterocyclic system, namely 8-(3,4-dimethyl-6-oxopyrano[2,3-c]pyrazole-1yl) xanthines (23-31) (Scheme 1) analogously to [11,12]. The IR spectra of 23-31 pyranopyrazoles contain stretching vibrations band of carbonyl group of α-pyran nucleus, which is fi xed at 1780-1744 cm -1 .…”

Section: Resultsmentioning

confidence: 99%