تفاعل #974031

معادلة التفاعل

tert-butyl 9-bromo-2,3-dihydro-1,4-benzoxazepine-4(5H)-carboxylate

2-methylphenylboronic acid

water

→

desired product

المردود 87.8%

tert-butyl 9-(2-methylphenyl)-2,3-dihydro-1,4-benzoxazepine-4(5H)-carboxylate

المردود 87.8%

المذيبات

ethanol

sodium carbonate

toluene

ظروف التفاعل

المعالجة

1. 1
   استخلاصthe mixture was extracted with ethyl acetate
2. 2
   غسيلThe extract was washed with water
3. 3
   تجفيفdried over anhydrous magnesium sulfate
4. 4
   أخرىThe solvent was evaporated under reduced pressure
5. 5
   أخرىthe residue was purified by silica gel column chromatography (hexane:ethyl acetate=2:1)

الإجراء التجريبي

A mixture of tert-butyl 9-bromo-2,3-dihydro-1,4-benzoxazepine-4(5H)-carboxylate (200 mg, 0.605 mmol), a solution of 2-methylphenylboronic acid (124 mg, 0.912 mmol) in ethanol (0.7 ml), 2N aqueous sodium carbonate solution (2.5 ml), and tetrakis(triphenylphosphine)palladium(0) (84.0 mg, 0.0730 mmol) in toluene (5 ml) was stirred under a nitrogen atmosphere at 95° C. for 12 hr. The reaction mixture was poured into water, and the mixture was extracted with ethyl acetate. The extract was washed with water, and dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure, and the residue was purified by silica gel column chromatography (hexane:ethyl acetate=2:1) to give the desired product (180 mg, 87.8%) as an oil.

المصدر