تفاعل #45815

معادلة التفاعل

N-Bromosuccinimide

N,N-dimethylformamide

methyl 4-acetylaminosalicylate

→

compound

المردود 45.0%

Methyl 4-acetylamino-5-bromosalicylate

المردود 45.0%

المذيبات

ethyl acetate

ظروف التفاعل

المعالجة

1. 1
   درجة الحرارةwith heating
2. 2
   درجة الحرارةAfter cooling to room temperature
3. 3
   غسيلby washing twice with saturated brine
4. 4
   تجفيفdrying over anhydrous magnesium sulfate
5. 5
   ترشيحAfter filtration and concentration under reduced pressure

الإجراء التجريبي

N-Bromosuccinimide (0.94 g, 5.3 mmol) was added to an N,N-dimethylformamide (8 ml) solution of methyl 4-acetylaminosalicylate (I-248) (1.1 g, 5.0 mmol), followed by stirring with heating under reflux at 70 to 75° C. for 2 hours and a half. After cooling to room temperature, ethyl acetate was added, followed by washing twice with saturated brine and drying over anhydrous magnesium sulfate. After filtration and concentration under reduced pressure, the resulting residue was subjected to column chromatography, and the eluate with chloroform/methanol (100:1) gave the entitled compound (0.64 g, 45%) as a pale red solid.

المصدر