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Chemical Structure| 1249591-19-2 Chemical Structure| 1249591-19-2

Structure of 1249591-19-2

Chemical Structure| 1249591-19-2

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Product Details of [ 1249591-19-2 ]

CAS No. :1249591-19-2
Formula : C9H10ClN5
M.W : 223.66
SMILES Code : CC1=NC(N2N=C(C)N=C2C)=CC(Cl)=N1

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Application In Synthesis of [ 1249591-19-2 ]

* 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.

  • Downstream synthetic route of [ 1249591-19-2 ]

[ 1249591-19-2 ] Synthesis Path-Downstream   1~1

  • 1
  • [ 7343-34-2 ]
  • [ 1780-26-3 ]
  • [ 1249591-19-2 ]
YieldReaction ConditionsOperation in experiment
69% With caesium carbonate; In N,N-dimethyl-formamide; at 20℃; for 66h; 4-chloro-6-(3,5-dimethyl-1H-1,2,4-triazol-1-yl)-2-methylpyrimidine (Intermediate 2) 4,6-dichloro-2-methylpyrimidine(2-1) (137.8 g, 845 mmol), <strong>[7343-34-2]3,5-dimethyl-1H-1,2,4-triazole</strong> (2-2)[0080] (82 g, 845 mmol), and Cs2CO3 (275 g, 845 mmol) were suspended in DMF (1L) and the resulting mixture wasstirred at room temperature for 66 h. The mixture was then poured into water (2L) and stirred for 1 hour. The precipitatewas filtered, washed with water (2x) and dried under vacuum to afford Intermediate 2 as an off-white solid (130 g, 69percent).MS: m/z = 224.2 (M+H).
With caesium carbonate; In N,N-dimethyl-formamide; at 0 - 20℃; for 2h; To a slurry of 4,6-dichloro-2-methylpyrirnidine (1-1) (5.00 g, 30.67 mmol, 1.0 eq.) and cesium carbonate (15.0 g, 46.05 mmol, 1.5 eq.) in DMF (250 mL) at 0 °C under nitrogen was added a solution of 3,5-dimethyl-lH-l,2,4-triazole (2.98 g, 30.67 mmol, 1.0 eq.) in DMF (50 mL) via a dropping funnel over 1 hour. The reaction was then warmed to room temperature and stirred for 1 hour. The reaction was quenched by addition of water (500 mL) and extracted with ethyl acetate (3 x 400 mL). The combined organic layers were dried over sodium sulfate, filtered and concentrated to dryness. The crude product was purified by silica gel column chromatography (0-30percent ethyl acetate in hexanes) to afford 4-chloro-6-(3,5-dimethyl-lH-l,2,4-triazol-l-yl)-2-methylpyrimidine (1-2) as a white solid. 'Eta NMR (300 MHz, CDC13) delta 7.75 (s, 1H), 2.91 (s, 3H), 2.72 (s, 3H), 2.41 (s, 3H). LRMS mlz (M+Ff) 224 found, 224 required.
With caesium carbonate; In tetrahydrofuran;Reflux; Intermediate 2 4-(3,5-dimethyl-lH-l,2,4-triazol-l-yl)-6-iodo-2-methylpyrimidine (Intermediate 2) A mixture of 4,6-dichloro-2-methylpyrimidine (505 mg, 3.1 mmol), 3,5-dimethyl-lH-l,2,4- triazole (300 mg, 3.1 mmol) and CS2CO3 (1.54 g, 4.7 mmol) in THF (20 mL) was heated at reflux overnight. The mixture was filtered and the filtrate was concentrated to give 4-chloro-6- (3,5-dimethyl-lH-l,2,4-triazol-l-yl)-2-methylpyrimidine that was used without further purification. MS: m/z = 224.1 (M+H). To a mixture of 4-chloro-6-(3,5-dimethyl-lH-l,2,4-triazol-l-yl)-2-methylpyrimidine (2.00 g, 8.9 mmol), KI (4.44 g, 26.8 mmol) was added 57percent aq. HI solution (20 mL, 89.2 mmol). After heating at 70 °C for 5 min, water (20 mL) was added to the reaction mixture. The white solid was filtered, rinsed with water, and dried under vacuum to give Intermediate 2 as a white solid. XH NMR (400 MHz, DMSO) delta 8.06 (s, 1H), 2.78 (s, 3H), 2.62 (s, 3H), 2.30 (s, 3H). MS: m/z = 316.1 (M+H).
With caesium carbonate; In N,N-dimethyl-formamide; at 0 - 20℃; for 2h; 4-chloro-6-(3,5-dimethyl-lH-l,2,4-triazol-l-yl)-2-methylpyrimidine (1-2) To a slurry of 4,6-dichloro-2-methylpyrimidine (1-1) (5.00 g, 30.7 mmol) and cesium carbonate (15.0 g, 46 mmol) in DMF (250 mL) at 0 °C was added a solution of 3,5-dimethyl-lH- 1,2,4- triazole (2.98 g, 30.7 mmol) in DMF (50 mL) via a dropping funnel over 1 h. The reaction was then warmed to room temperature and stirred for 1 h. The reaction was quenched by addition of water (500 mL) and extracted with ethyl acetate (3 x 400 mL). The combined organic layer was dried over sodium sulfate, filtered and concentrated. The crude product was purified by silica gel column chromatography (0-30percent EtOAc/hexanes) to afford 4-chloro-6-(3,5-dimethyl-lH- l,2,4-triazol-l-yl)-2-methylpyrimidine (1-2) as a white solid. XH NMR (400 MHz, CDC13) delta 7.75 (s, 1H), 2.91 (s, 3H), 2.72 (s, 3H), 2.41 (s, 3H); MS mlz = 224 (M+H).

 

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