Triethylamine → 4-[1-(1-methyl-2-{4-[(1-methyl-1H-pyrazol-3-yl)sulfonyl]piperazin-1-yl}ethyl)-1H-pyrazol-4-yl]-7-{[2-(trimethylsilyl)ethoxy]methyl}-7H-pyrrolo[2,3-d]pyrimidine

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Reaction Steps

To a mixture of 4-[1-(1-methyl-2-piperazin-1-ylethyl)-1H-pyrazol-4-yl]-7-{[2-(trimethylsilyl)ethoxy]methyl}-7H-pyrrolo[2,3-d]pyrimidine (1.1 g, 2.5 mmol) in dichloromethane (20 mL) was added triethylamine (0.52 mL, 3.7 mmol) followed by 1-methyl-1H-pyrazole-3-sulfonyl chloride (0.54 g, 3.0 mmol). The reaction was stirred at RT for 1 h, then quenched with saturated sodium bicarbonate, and extracted with dichloromethane. The combined organic layers were washed with brine and dried over sodium sulfate. After being concentrated to dryness, the residue was purified on silica gel, eluting with 0 to 10% methanol in dichloromethane to provide the product (1.28 g, 87.7%). LCMS calculated for C26H40N9O3SSi (M+H)+: m/z=586.3; Found: 586.2. The product was separated on a ChiralCel OD-H column (3×25 cm, 5 μM), eluting with a gradient of ethanol in hexanes at flow rate 28 mL/min, to give the two enantiomers. First peak with retention time 20.76 min and second peak with retention time 24.72 min.

Provenance & Evidence