Synthesis of partially hydrogenated pyrazolo[3,4-b]quinolinones by condensation of 3-amino-5-methylpyrazole with aromatic aldehydes and dimedone

Pleiades Publishing Ltd - Tập 42 Số 7 - Trang 1015-1021 - 2006
Lipson, V. V.1, Shirobokova, M. G.1, Shishkin, O. V.2, Shishkina, S. V.2
1Danilevskii Institute of Endocrinic Pathology Problems, Academy of Medical Sciences of Ukraine, Kharkiv, Ukraine
2State Scientific Enterprise Research and Technology Association “Institute of Single Crystals”, National Academy of Sciences of Ukraine, Ukraine

Tóm tắt

Cyclocondensation of 3-amino-5-methylpyrazole with 2-arylmethylidene-5,5-dimethylcyclohexane-1,3-diones or 9-aryl-3,3,6,6-tetramethyl-2,3,4,5,6,7,8,9-octahydro-1H-xanthene-1,8-diones, as well as with synthetic precursors of the latter (para-substituted benzaldehydes and dimedone), in dimethylformamide or methanol gives the corresponding 4-aryl-3,7,7-trimethyl-2,4,6,7,8,9-hexahydropyrazolo[3,4-b]quinolin-5-ones. The structure of 4-(4-methoxyphenyl)-3,7,7-trimethyl-2,4,6,7,8,9-hexahydropyrazolo[3,4-b]quinolin-5-one was proved by the X-ray diffraction data.

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