تفاعل #60261

معادلة التفاعل

Hydrochloric acid

6-(4-bromo-2-chloro-phenylamino)-7-fluoro-3-methyl-3H-benzoimidazole-5-carboxylic acid (2-vinyloxy-ethoxy)-amide

6-(4-Bromo-2-chloro-phenylamino)-7-fluoro-3-methyl-3H-benzoimidazole-5-carboxylic acid (2-vinyloxy-ethoxy)-amide

→

6-(4-bromo-2chloro-phenylamino)-7-fluoro-3-methyl-3H-benzoimidazole-5-carboxylic acid (2-hydroxy-ethoxy)-amide

المردود 102.4%

المذيبات

ethanol

ظروف التفاعل

المعالجة

1. 1
   تركيزThe reaction mixture is concentrated to dryness by rotary evaporation
2. 2
   أخرىthe solids partitioned between 3:1 ethyl acetate/tetrahydrofuran and saturated potassium carbonate
3. 3
   استخلاصThe aqueous phase is extracted with 3:1 ethyl acetate/tetrahydrofuran (3×)
4. 4
   تجفيفthe combined organics dried (Na2SO4)
5. 5
   تركيزconcentrated

الإجراء التجريبي

Hydrochloric acid (14 mL, 1.0 M aqueous solution, 14 mmol) is added to a suspension of 6-(4-bromo-2-chloro-phenylamino)-7-fluoro-3-methyl-3H-benzoimidazole-5-carboxylic acid (2-vinyloxy-ethoxy)-amide 29a (2.18 g, 4.50 mmol) in ethanol (50 mL) and the reaction mixture allowed to stir for 24 hours. The reaction mixture is concentrated to dryness by rotary evaporation and the solids partitioned between 3:1 ethyl acetate/tetrahydrofuran and saturated potassium carbonate. The aqueous phase is extracted with 3:1 ethyl acetate/tetrahydrofuran (3×), the combined organics dried (Na2SO4), and concentrated to provide 2.11 g (100%) 6-(4-bromo-2chloro-phenylamino)-7-fluoro-3-methyl-3H-benzoimidazole-5-carboxylic acid (2-hydroxy-ethoxy)-amide as an off-white solid. MS ESI (+) m/z 457, 459 (M+, Br pattern) detected. 1H NMR (400 MHz, MeOH-d4) δ 8.26 (s, 1H), 7.78 (s, 1H), 7.57 (d, 1H), 7.24 (dd, 1H), 6.40 (dd, 1H), 3.86 (s, 3H), 3.79 (m, 2H), 3.49 (m, 2H). 19F NMR (376 MHz, MeOH-d4)-133.68 (s).

المصدر