Diethyl Ether → 2-(4-(6-((9-Cyclopentyl-9H-pyrido[4',3':4,5]pyrrolo[2,3-d]pyrimidin-2-yl)amino)-3-pyridinyl)-1-piperazinyl)ethanol

Participants

Reaction Steps

Compound 296 (85.0 mg, 148 μmol) was dissolved in dry THF (3 mL).). Tetrabutylammonium fluoride, 1.0M in THF (1.00 mL, 1.00 mmol) was added and the reaction stirred at room temperature for 2 hours. The solvent was removed in vacuo and silica gel chromatography (gradient elution hexanes+2.5%/0-100% ethyl acetate+2.5% TEA, then ethyl acetate+2.5% TEA/0-5% methanol) afforded a yellow solid. This residue was taken up in methanol (3 mL) and 1M ethanolic HCl (1 mL). Diethyl ether (20 mL) was added to precipitate the product, which was filtered and dried in vacuo to give compound 295 as a yellow solid (54 mg, 79%). 1H NMR (500 MHz, DMSO-d6) δ 10.75-10.97 (m, 2 H) 9.70 (s, 2 H) 9.47 (s, 1 H) 8.74 (d, J=3.67 Hz, 2 H) 8.16 (d, J=2.45 Hz, 1 H) 7.99-8.10 (m, 1 H) 7.84-7.99 (m, 1 H) 5.30-5.52 (m, 1 H) 3.81-3.96 (m, 4 H) 3.62-3.72 (m, 2 H) 3.20-3.36 (m, 6 H) 2.39-2.49 (m, 2 H) 2.02-2.20 (m, 4 H) 0.88 (d, J=6.85 Hz, 2 H) ppm.

Provenance & Evidence