Triphenylphosphine → 1-Methyl-4-(4-phenoxy-quinazolin-6-ylethynyl)-piperidin-4-ol

関与物質

反応条件

反応手順

To a 100 mL round bottom flask under nitrogen were added, quinazoline 13 (1.32 g, 3.80 mmol), 4-ethynyl-1-methyl-piperidin-4-ol (1.06 g, 7.6 mmol), Pd(OAc)2 (51 mg, 0.23 mmol), PPh3 (120 mg, 0.46 mmol) and triethylamine (18 mL). The flask was equipped with a reflux condenser and the mixture heated to 100° C. for 16 hours. The dark solution was then cooled and the triethylamine removed under reduced pressure. The resulting residue was diluted with EtOAc (75 mL) and H2O (25 mL) and transferred to a separatory funnel. The organic layer was washed successively with H2O (2×25 mL) and the combined aqueous washes back extracted with EtOAc (25 mL). The combined organic layers were dried (MgSO4) and the solvent removed under reduced pressure. The resulting black foam was purified on silica gel (50 g) eluting with 250 mL 30:1 CH2Cl2:MeOH, then 400 mL 30:1:1 CH2Cl2:MeOH:NEt3 to provide the desired product as a yellow foam (930 mg, 68%). 1H NMR: (CDCl3; 400 MHz) δ: 8.71 (s, 1H), 8.36 (d, 1H, J=1.9 Hz), 7.89 (d, 1H, J=8.7 Hz), 7.80 (dd, 1H, J=8.7 Hz, 1.9 Hz), 7.45 (t, 2H, J=8.3 Hz), 7.31 (m, 1H), 7.21 (m, 2H), 2.72 (br, 2H), 2.47 (br, 2H), 2.31 (s, 3H), 2.09 (m, 2H), 2.00 (m, 2H).

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