Реакция #1772010

Уравнение реакции

NaHCO3

BBr3

2-(4′-methylamino-3′-iodophenyl)-6-methoxy benzothiazole

Water

→

2-(4′-methylamino-3′-iodophenyl)-6-hydroxy benzothiazole

Выход 43.6%

Растворители

CH2Cl2

Условия реакции

Обработка

1. 1
   Другоеto quench
2. 2
   Другоеthe reaction
3. 3
   Экстракцияextracted with ethyl acetate (3×5 mL)
4. 4
   Сушкаdried over MgSO4
5. 5
   Другоеevaporated
6. 6
   ДругоеThe residue was purified with preparative TLC (Hexane:EA=7:3)

Методика

To a solution of 2-(4′-methylamino-3′-iodophenyl)-6-methoxy benzothiazole (12 mg, 0.03 mmol) dissolved in CH2Cl2 (4 mL) was added BBr3 (400 μl, 0.4 mmol, 1M in CH2Cl2) under N2. The reaction was allowed to stir at room temperature for 18 hr. Water was then added to quench the reaction and the solution was neutralized with NaHCO3, extracted with ethyl acetate (3×5 mL). The organic layers were combined, dried over MgSO4 and evaporated. The residue was purified with preparative TLC (Hexane:EA=7:3) to give 2-(4′-methylamino-3′-iodophenyl)-6-hydroxy benzothiazole (5 mg, 43%) as brown solid. 1HNMR (300 MHz, CDCl3) δ(ppm): 8.37 (d, H=2.0 Hz, 1H), 7.88 (dd, J1=2.0 Hz, J2=8.4 Hz, 1H), 7.83 (d, J=8.8 Hz, 1H), 7.28 (d, J=2.4 Hz, 1H), 6.96 (dd, J1=2.5 Hz, J2=8.8 Hz, 1H), 6.58 (d, J=8.5 Hz, 1H), 2.96 (s, 3H, CH3).

Источник