تفاعل #713848

معادلة التفاعل

DIPEA

methyl chloroformate

2-(2,6-dichlorophenyl)-2H-pyrazolo[4,3-c]pyridine-4-ylamine

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title compound

المردود 49.4%

[2-(2,6-Dichlorophenyl)-2H-pyrazolo[4,3-c]pyridine-4-yl]carbamic acid methyl ester

المردود 49.4%

المذيبات

DCM

ظروف التفاعل

المعالجة

1. 1
   أخرىThe mixture was partitioned between DCM and water
2. 2
   غسيلThe organic layer was washed with brine
3. 3
   تجفيفdried over anhydrous sodium sulfate
4. 4
   تركيزconcentrated under reduced pressure
5. 5
   أخرىThe residue was purified by silica gel flash chromatography (40-50% ethyl acetate in cyclohexane)

الإجراء التجريبي

DIPEA (51 μL, 0.3 mmol) and then methyl chloroformate (19 μL, 0.25 mmol) were added to a solution of 2-(2,6-dichlorophenyl)-2H-pyrazolo[4,3-c]pyridine-4-ylamine (60 mg, 0.21 mmol) in DCM (2 mL). The reaction was stirred at room temperature until completion as determined by TLC. The mixture was partitioned between DCM and water. The organic layer was washed with brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel flash chromatography (40-50% ethyl acetate in cyclohexane) to afford the title compound as a white solid (35 mg, 49% yield). 1H NMR (400 MHz, DMSO-d6): δ 9.54 (d, J=0.9 Hz, 1H), 7.97 (d, J=7.3 Hz, 1H), 7.86 (d, J=1.4 Hz, 1H), 7.84 (d, J=0.6 Hz, 1H), 7.80-7.78 (m, 1H), 7.72 (dd, J=7.3, 0.9 Hz, 1H), 3.97 (s, 3H). LCMS (Method B): RT=2.71 min, m/z: 337 [M+H+].

المصدر