Reaction Steps
To a degassed solution of 3-methyl-4-[1-methyl-3-(2-pyridyl)-4,6,7,8-tetrahydropyrazolo[3,4-e][1,4]thiazepin-4-yl]phenol (0.071 g, 0.2 mmol, Ex. #D.42) in anhydrous THF (10 mL) was added 3-pyridinemethanol (0.033 g, 0.3 mmol) and triphenylphosphine (0.131 g, 0.5 mmol), at rt. After 30 min the mixture was cooled to about 0° C. and diisopropyl azodicarboxylate (0.1 mL, 0.5 mmol) was added dropwise. The resulting mixture was stirred for about 16 h at rt, and then concentrated in vacuo. The residue was purified by column chromatography (SiO2, ethyl acetate/methanol 95:5) followed by trituration with diethyl ether to give 1-methyl-4-[2-methyl-4-(3-pyridylmethoxy)phenyl]-3-(2-pyridyl)-4,6,7,8-tetrahydropyrazolo[3,4-e][1,4]thiazepine (0.012 g, 0.03 mmol, 14%) as a pale yellow solid: LC-MS (Table 1, Method e) Rt=5.09 min; m/z 444 (M+H)+; 1H-NMR (CDCl3, Bruker 400 MHz) δ 2.59 (3 H, s) 2.70 (1 H, ddd, J=14.9, 6.1, 2.3 Hz) 2.88 (1 H, ddd, J=14.9, 8.8, 2.5 Hz) 3.19-3.29 (1 H, m) 3.53-3.62 (1 H, m) 3.78 (1 H, br s) 3.84 (3 H, s) 5.01 (2 H, s) 6.62 (1 H, s) 6.63 (1 H, dd, J=8.4, 2.6 Hz) 6.82 (1 H, d, J=2.6 Hz) 7.07 (1 H, ddd, J=7.4, 4.9, 1.2 Hz) 7.16 (1 H, d, J=8.4 Hz) 7.30 (1 H, dd, J=7.8, 4.9 Hz) 7.58 (1 H, td, J=7.8, 1.9 Hz) 7.71-7.79 (2 H, m) 8.48 (1 H, d, J=4.9 Hz) 8.56 (1 H, dd, J=4.8, 1.5 Hz) 8.65 (1 H, d, J=1.9 Hz).
