Reacción #1772007

Ecuación de reacción

2-(4′-aminophenyl)-6-methoxy benzothiazole

iodochloride

CH2Cl2

→

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

Rendimiento 76.0%

Disolventes

acetic acid

Condiciones de reacción

Tratamiento posterior

1. 1
   OtroThe glacial acetic acid was removed under reduced pressure
2. 2
   workup.DISSOLUTIONthe residue was dissolved in CH2Cl2
3. 3
   Otrothe aqueous layer was separated
4. 4
   Extracciónextracted with CH2Cl2
5. 5
   Secadodried over MgSO4
6. 6
   Otrothe evaporation of the solvent
7. 7
   Otrothe residue was purified by preparative TLC(Hexanes:ethyl acetate=6:1)

Procedimiento

To a solution of 2-(4′-aminophenyl)-6-methoxy benzothiazole (22 mg, 0.09 mmol) in glacial acetic acid (2.0 mL) was injected 1 M iodochloride solution in CH2Cl2 (0.10 mL, 0.10 mmol, 1.2 eq.) under N2 atmosphere. The reaction mixture was stirred at room temperature for 16 hr. The glacial acetic acid was removed under reduced pressure and the residue was dissolved in CH2Cl2. After neutralizing the solution with NaHCO3, the aqueous layer was separated and extracted with CH2Cl2. The organic layers were combined and dried over MgSO4. Following the evaporation of the solvent, the residue was purified by preparative TLC(Hexanes:ethyl acetate=6:1) to give 2-(4′-amino-3′-iodophenyl)-6-methoxy benzothiazole (25 mg, 76%) as brown solid. 1HNMR (300 MHz, CDCl3) δ (ppm): 8.35 (d, J=2.0 Hz, 1H), 7.87 (dd, J1=2.0 Hz, J2=9.0 Hz, 1H), 7.31 (d, J=2.2 Hz, 1H), 7.04 (dd, J1=2.2 Hz, J2=9.0 Hz, 1H), 6.76 (d, J=9.0 Hz, 1H), 3.87 (s, 3H).

Fuente