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6-methyl-1-(2,4-dinitrophenyl)-1H-pyrazolo[3,4-d] pyrimidin-4(5H)-one (2a)
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Yellow crystals, IR (KBr, cm−1): 3284, 3071, 2969, 2921, 1645, 1605; 1H NMR (DMSO-d6, d): 2.44 (s, 3H, CH3), 7.74 (s, 1H, pyrazole CH), 8.39 (d, 1H, aro. CH at 6′, J = 8.7 Hz), 8.74 (d, 1H, aro. CH at 5′, J = 8.7 Hz), 8.95 (s, 1H, aro. CH at 3′), 12.3 (s, 1H, pyrimidine NH, D2O exchangeable); 13C NMR (DMSO-d6, δ): 20.88 (CH3), 108.28 (C-3a), 120.58 (C-3′), 124.46 (C-6′), 128.31 (C-5′), 137.6 (C-1′), 142.07 (C-3), 142.86 (C-7a), 142.95 (C-2′), 146.22 (C-4′), 154.58 (C-6), 160.93 (C=O); MS: m/z 316 (M+).
Copyright and License information: ©2017 Journal of Pharmacy and Bioallied Sciences
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