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Chemical Structure| 188577-71-1 Chemical Structure| 188577-71-1

Structure of 188577-71-1

Chemical Structure| 188577-71-1

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Product Details of [ 188577-71-1 ]

CAS No. :188577-71-1
Formula : C10H12Cl2N2O
M.W : 247.12
SMILES Code : CC(C)(C)C(NC1=NC=C(Cl)C(Cl)=C1)=O
MDL No. :MFCD08274902

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Application In Synthesis of [ 188577-71-1 ]

* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.

  • Upstream synthesis route of [ 188577-71-1 ]

[ 188577-71-1 ] Synthesis Path-Upstream   1~1

  • 1
  • [ 188577-71-1 ]
  • [ 188577-68-6 ]
YieldReaction ConditionsOperation in experiment
86% With hydrogenchloride In water at 100℃; for 17 h; A mixture of 4,5-dichloro-2-trimethylacetamido-pyridine (0.500 g, 2.02 mmol) and aqueous HCl (6N; 9.5 ml) was heated was heated at 100° C. for 17 h. The reaction mixture was allowed to cool to room temperature, diluted with ice-water (15 ml), and the pH of the mixture was adjusted to 7.0 with 10percent aqueous NaOH. The white precipitate was collected by filtration, washed with water (2.x.5 ml), and dried in vacuo over P2O5. The title compound was obtained as a white solid (0.284 g, 86percent); 1H-NMR (500 Mz, DMSO-d6) 6.44 (s, 2H, NH2, exchangeable with D2O), 6.64 (s, 1H), and 8.03 (s, 1H) (3-H, 6-H); LC-MS (ESI, m/z) 4.37 min-163, 165, 167 [(M+H)+, Cl2 isotopic pattern].
85% With hydrogenchloride In water at 100℃; for 10 h; A mixture of N-(4,5-dichloropyridin-2-yl)pivalamide (1.25 g, 5.04 mmol) in 6N HCl (20 mL) was stirred at 100° C. for 10 h. The mixture was cooled, combined with water (20 mL), and basified by the addition of sodium bicarbonate solution (20 mL). The mixture was extracted with ethyl acetate (3×40 mL), and the combined organic layers were dried over sodium sulfate, then evaporated under reduced pressure and purified by gradient column chromatography using ethyl acetate in n-hexane as eluent to afford 4,5-dichloropyridin-2-amine as a white solid (0.7 g, 85percent). 1HNMR (400 MHz, CDCl3): δ 8.06 (s, 1H), 6.60 (s, 1H), 4.48 (br s, 2H). LC-MS calcd exact mass 161.98, found m/z 162.8 [M+H]+.
References: [1] Synthetic Communications, 1997, vol. 27, # 5, p. 861 - 870.
[2] Patent: US2009/247507, 2009, A1, . Location in patent: Page/Page column 7.
[3] Patent: US2016/362407, 2016, A1, . Location in patent: Paragraph 0558-0559.
[4] Patent: WO2010/122151, 2010, A1, . Location in patent: Page/Page column 66.
 

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