Реакция #70555

Уравнение реакции

5-bromo-2-iodopyrimidine

benzene boronic acid

sodium carbonate

→

oil

Выход 110.3%

5-bromo-2-phenylpyrimidine

Выход 110.3%

Растворители

toluene

Условия реакции

Обработка

1. 1
   Другоеthe mixture was partitioned between chloroform (250 mL) and brine (200 mL)
2. 2
   ДругоеThe phases were separated
3. 3
   Сушкаthe organic phase was dried over anhydrous magnesium sulfate
4. 4
   Концентрированиеconcentrated under reduced pressure

Методика

A mixture consisting of 5-bromo-2-iodopyrimidine (Bridge Organics, 10.0 g, 35.1 mmol), benzene boronic acid (Alfa Aesar, 4.25 g, 35.1 mmol), tetrakis(triphenylphosphine)palladium (Strem, 0.405 g, 0.351 mmol), toluene (150 mL), and a 2 M aqueous sodium carbonate solution (35 mL) was stirred at 115° C. (degrees Celsius) under a nitrogen atmosphere for 16 hours. After cooling to room temperature, the mixture was partitioned between chloroform (250 mL) and brine (200 mL). The phases were separated and the organic phase was dried over anhydrous magnesium sulfate, and concentrated under reduced pressure to give an orange oil (9.1 g). The crude product was purified by flash silica column chromatography. Elution through a 500-g Analogix® flash silica cartridge with 100% hexanes afforded the title intermediate as a white solid (3.15 g, 38% yield). Rf 0.69 with 9:1 v/v hexanes-ethyl acetate; 1H-NMR (400 MHz; CDCl3) δ 8.83 (s, 2H), 8.44-8.38 (m, 2H), 7.52-7.46 (m, 3H); MS (APCI+) m/z 236.9 (M+1).

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