反应详情

A 500 ml round bottom flask was charged with a mixture of 6-amino-1-hydroxy-2,1-benzoxaborolane hydrochloride (5 g, 26.9 mmol, 1 eq), triethylamine (11.2 ml, 80.7 mmol, 3 eq) and dichloromethane (200 ml). 4-Fluoro-2-(trifluoromethyl)benzoyl chloride (4.3 ml, 28.2 mmol, 1.05 eq) was then added, and the reaction mixture was allowed to stir at room temperature overnight. 1M HCl (100 ml) was added to the mixture and the reaction was stirred for an additional hour. The resulting precipitate was then collected, and the off-white powder was dried under vacuum. LCMS (m/e) 340 (M+H). 1H NMR (400 MHz, DMSO-d6) δ ppm 4.96 (s, 2 H) 7.39 (d, J=8.4 Hz, 1 H) 7.61-7.73 (m, 2 H) 7.75-7.87 (m, 2 H) 8.13 (dd, J=1.8, 0.4 Hz, 1 H) 9.25 (s, 1 H) 10.59 (s, 1 H) Amount Obtained: 5.2 g, 57% yield.

1. stirringthe reaction was stirred for an additional hour
2. customThe resulting precipitate was then collected
3. customthe off-white powder was dried under vacuum
4. custom1H NMR (400 MHz, DMSO-d6) δ ppm 4.96 (s, 2 H) 7.39 (d, J=8.4 Hz, 1 H) 7.61-7.73 (m, 2 H) 7.75-7.87 (m, 2 H) 8.13 (dd, J=1.8, 0.4 Hz, 1 H) 9.25 (s, 1 H) 10.59 (s, 1 H) Amount Obtained