反应详情

To a solution of 3-hydroxy-benzonitrile (500 mg, 4.17 mmol), 1-methyl-piperidin-4-ol (467 mg, 4.17 mmol) and triphenyl phosphine (1.64 g, 6.26 mmol) in tetrahydrofuran (40 mL) was added diisopropyl azodicarboxylate (1.23 μL, 6.26 mmol) dropwise. The reaction mixture was stirred for 4 hr at rt. The solution was concentrated to dryness and the residue was chromatographered using ethyl acetate then ethyl acetate/methanol (8:1) to give the title compound (380 mg, 42%). MS (DCI/NH3) m/z 217 (M+1)+. 1H NMR (400 MHz, DMSO-d6) δ ppm 1.60 (m, 2H) 1.91 (m, 2H) 2.15 (m, 2H) 2.16 (s, 3H) 2.60 (m, 2H) 4.46 (m, 1H) 7.28 (dd, J=7.67, 1.84 Hz, 1H) 7.35 (d, J=7.36 Hz, 1H) 7.45 (m, 2H).

1. concentrationThe solution was concentrated to dryness