Water → 3-[4-(3-Amino-1h-indazol-5-yl)-1h-pyrazol-1-yl]propanenitrile

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

To a microwave vial was added 5-bromo-1H-indazol-3-amine (0.14 g, 0.66 mmol), tetrakis(triphenylphosphine)palladium(0) (0.076 g, 0.066 mmol), and sodium carbonate (0.147 g, 1.39 mmol) followed by a solution of Example 267A (0.212 g, 0.858 mmol) in 1,2-dimethoxyethane (2.50 mL) and then water (1.25 mL). The mixture was heated in a CEM microwave at about 150° C. for about 20 minutes (275 psi maximum pressure, about 2 minutes ramp, 200 maximum watts) and then the mixture was concentrated under reduced pressure. Methanol (20 mL) was added and the resulting mixture was stirred for about 1 hour. The insoluble material was removed by filtration. The filtrate was concentrated under reduced pressure onto silica gel and purified via silica gel chromatography eluting with a stepwise gradient of dichloromethane/methanol/ammonium hydroxide (990:9:1 to 985:13.5:1.5 to 980:18:2) to afford a solid. This solid was dissolved in a minimum amount of hot acetonitrile (˜2 mL), filtered to remove minor amount of insolubles, while washing with methanol (<0.5 mL), and left to sit at ambient temperature. The resulting solid that formed overnight was collected by filtration, while washing with additional acetonitrile, and dried in a vacuum oven at about 60° C. for about 2 hours to afford the title compound. 1H NMR (400 MHz, DMSO-d6) δ ppm 11.35 (s, 1H), 8.10 (s, 1H), 7.86 (s, 1H), 7.84 (s, 1H), 7.44 (dd, J=8.54, 1.26 Hz, 1H), 7.23 (d, J=8.62 Hz, 1H), 5.32 (s, 2H), 4.42 (t, J=6.36 Hz, 2H), 3.10 (t, J=6.43 Hz, 2H). MS (ESI+) m/z 253.2 (M+H)+.

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