Dichloromethane → (R)-2-(3-(4-amino-3-(4-(3-fluorophenoxy)phenyl)-1H-pyrazolo[3,4-d]pyrimidin-1-yl)piperidine-1-carbonyl)-3-cyclopropylacrylonitrile

Participants

Reaction Steps

Into a 50 mL round-bottom flask, was placed a solution of 3-[(3R)-3-[4-amino-3-[4-(3-fluorophenoxy)phenyl]-1H-pyrazolo[3,4-d]pyrimidin-1-yl]piperidin-1-yl]-3-oxopropanenitrile (120 mg, 0.25 mmol, 1.00 equiv) in methanol (20 mL), cyclopropanecarbaldehyde (54 mg, 0.77 mmol, 3.00 equiv), piperidine (11 mg, 0.13 mmol, 0.50 equiv), and dichloromethane (5 mL). The resulting solution was stirred for 12 h at room temperature and then concentrated under vacuum. The residue was loaded onto a silica gel column and eluted with dichloromethane/methanol (100:1) to give 36 mg (27%) of the title compounds as a white solid. LC-MS: (ES, m/z): 524 [M+H]+. H-NMR: (300 MHz, CDCl3, ppm) 8.396 (1H, s), 7.721˜7.674 (2H, m), 7.393˜7.316 (1H, m), 7.237˜7.191 (2H, m), 6.923˜6.786 (3H, m),6.607˜6.570 (1H, d, J=11.1), 5.795 (2H, s), 5.018˜4.919 (1H, m), 4.8˜3.1 (4H, m), 2.465˜2.269 (5H, m),1.274 (2H, m), 0.887 (2H, m).

Provenance & Evidence