Potassium Acetate → 4-(5-(1,3-dioxolan-2-yl)-2-fluoropyridin-3-yl)-N,N-bis(4-methoxybenzyl)-6-methyl-1,3,5-triazin-2-amine

関与物質

反応条件

反応手順

4-Chloro-N,N-bis(4-methoxybenzyl)-6-methyl-1,3,5-triazin-2-amine (Example 51; (2.102 g, 5.462 mmol), 5-(1,3-dioxolan-2-yl)-2-fluoro-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine (Example 234; 1.901 g, 6.442 mmol), Am-Phos (200.6 mg, 0.2833 mmol), and potassium acetate (1.51 g, 15.4 mmol) were suspended in water (4 mL) and 1,4-dioxane (20 mL) and nitrogen was bubbled through the suspension for 30 s. Then, the flask was fitted with a reflux condenser and placed in a preheated oil bath (100° C.) and stirred under nitrogen for 4 h. Then, the reaction was cooled to room temperature, treated with water (40 mL), and extracted with EtOAc. The organic extracts were combined, dried over sodium sulfate, filtered through a Celite® (diatomaceous earth) pad, and concentrated. The crude material was purified on a silica gel filter (600 mL fritted funnel with about 3 inches of silica gel; DCM to 100:1 DCM/MeOH to 50:1 DCM/MeOH) to give 4-(5-(1,3-dioxolan-2-yl)-2-fluoropyridin-3-yl)-N,N-bis(4-methoxybenzyl)-6-methyl-1,3,5-triazin-2-amine (3.175 g). 1H NMR (CDCl3, 400 MHz) δ 8.65 (dd, J=8.90 Hz, 2.45 Hz, 1H), 8.42 (d, J=1.37 Hz, 1H), 7.23 (dd, J=8.41 Hz, 5.87 Hz, 4H), 6.87 (dd, J=10.27 Hz, 8.71 Hz, 4H), 5.93 (s, 1H), 4.83 (s, 2H), 4.81 (s, 2H), 4.17-4.04 (m, 4H), 3.82 (s, 3H), 3.80 (s, 3H), 2.55 (s, 3H). m/z (ESI, +ve ion) 518 (M+H)+.

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