2-Methyl-2-butanol → (S)-N-(1-(9-isopropyl-6-((4-(4-methylpiperazin-1-yl)phenyl)amino)-9H-purin-2-yl)pyrrolidin-3-yl)acrylamide

Participants

Reaction Steps

(S)-2-(3-Aminopyrrolidin-1-yl)-9-isopropyl-N-(4-(4-methylpiperazin-1-yl)phenyl) -9H-purin-6-amine (315 mg, 0.7 mmol) was dissolved in DCM:tert-pentyl alcohol (15 mL:1.5 mL) and sat. aq. NaHCO3 (6 mL) was added in one portion. The bi-phasic mixture was stirred vigorously and acryloyl chloride (90 μL, 1.1 mmol, 1.5 mol eq) was added in one portion and the resulting mixture was stirred at ambient temperature for 2 hr. The reaction was diluted with DCM (30 mL) and the organic layer was separated, and the product was extracted with more DCM:tert-pentyl alcohol (9:1, 30 mL). The combined organics were dried over Na2SO4 and evaporated to give a residue that was purified via silica flash chromatography with gradient of 100% ethyl acetate to 100 ethanol to give a crude purity at ˜90%. This crude was triturated with ethyl acetate:heptane (4:1, 15 mL). The resulting white solid was collected by filtration, washed with ethyl acetate:heptane (4:1, 10 mL) and dried to give the title product as a white solid (118 mg, 33% yield, ˜95% purity). 1H NMR (400 MHz, DMSO-d6) δ ppm 9.16 (s, 1 H) 8.36 (d, J=6.72 Hz, 1 H) 7.91 (s, 1 H) 7.85 (d, J=8.80 Hz, 2 H) 6.87 (d, J=8.93 Hz, 2 H) 6.18-6.34 (m, 1 H) 6.03-6.15 (m, 1 H) 5.59 (dd, J=9.96, 2.02 Hz, 1 H) 4.62 (dt, J=13.33, 6.54 Hz, 1 H) 4.43 (d, J=5.14 Hz, 1 H) 3.71-3.87 (m, 1 H) 3.63 (dt, J=12.62, 6.46 Hz, 2 H) 3.43 (dd, J=11.25, 3.30 Hz, 1 H) 3.07 (m, J=4.65 Hz, 4 H) 2.45 (m, J=4.40 Hz, 4 H) 2.22 (s, 4 H) 1.89 (dd, J=11.37, 5.87 Hz, 1 H) 1.51 (d, J=6.72 Hz, 6 H). m/z (APCI+) for C26H35N9O 490.2 (M+H)+.

Provenance & Evidence