3-Amino-4-methoxypyridine → 4-[2-(difluoromethyl)-4-methoxy-1H-benzimidazol-1-yl]-N-(4-methoxy-3-pyridinyl)-6-(4-morpholinyl)-1,3,5-triazin-2-amine

Participants

Reaction Steps

To a solution of 0.121 g (0.98 mmol) of 3-amino-4-methoxypyridine in THF (3 mL) was added 0.44 mL of butyllithium (2.5 M solution in hexanes), and the mixture stirred for 15 min. A solution of 0.128 g (0.32 mmol) of 1-[4-chloro-6-(4-morpholinyl)-1,3,5-triazin-2-yl]-2-(difluoromethyl)-4-methoxy-1H-benzimidazole in THF (6 mL) was added and the resulting mixture was stirred for 1 hr. After neutralization with acetic acid, the mixture was diluted with water and extracted with EtOAc. The organic layer was washed sequentially with water and aq. NH3, dried, and concentrated. Chromatography on alumina, eluting first with hexanes/EtOAc (8:2) and then with CH2Cl2/EtOAc (2:1) to CH2Cl2/EtOAc (1:1) gave a yellow powder. Recrystallization from ethanol/CH2Cl2 gave 0.065 g (42% yield) of 4-[2-(difluoromethyl)-4-methoxy-1H-benzimidazol-1-yl]-N-(4-methoxy-3-pyridinyl)-6-(4-morpholinyl)-1,3,5-triazin-2-amine: mp 239-241° C.; 1H NMR (CDCl3) δ9.43 (br s, 1H), 8.31 (d, J=5.6 Hz, 1H), 7.96 (d, J=8.2 Hz, 1H), 7.54 (t, JHF=53.4 Hz, 1H), 7.39-7.35 (m, 2H), 6.89 (d, J=5.6 Hz, 1H), 6.83 (d, J=8.2 Hz, 1H), 4.05 (s, 3H), 4.00 (s, 3H), 3.94 (s, 4H), 3.82-3.80 (m, 4H); Anal. Calcd. for C22H22F2N8O3: C, 54.5; H, 4.6; N, 23.1. Found: C, 54.4; H, 4.5; N, 22.9%.

Provenance & Evidence