Reacción #51740

Ecuación de reacción

EtOAc

methyl chloroformate

4-isopropyl-7-methyl-6-thiocyanato-benzothiazol-2-yl-amine

H2O

→

2-(methyloxycarbonyl)amino-4-isopropyl-7-methyl-6-thiocyanato-benzothiazole

Disolventes

pyridine

CH2Cl2

Condiciones de reacción

Tratamiento posterior

1. 1
   LavadoThe organic layer was washed with 2N HCl, H2O, saturated sodium bicarbonate solution and brine
2. 2
   Secadowas dried (MgSO4)
3. 3
   OtroThe solvents were evaporated
4. 4
   Otrothe residue was purified by flash chromatography (100% hexanes to 25% EtOAc in hexanes)

Procedimiento

To 4-isopropyl-7-methyl-6-thiocyanato-benzothiazol-2-yl-amine (Example L-4; 4.0 g, 17 mmol) dissolved in CH2Cl2 (25 mL) and pyridine (5 mL), was added methyl chloroformate at 0° C. The reaction mixture was stirred at room temperature for 2 hours. H2O was added to the reaction mixture followed by EtOAc (100 mL). The organic layer was washed with 2N HCl, H2O, saturated sodium bicarbonate solution and brine, and was dried (MgSO4). The solvents were evaporated, and the residue was purified by flash chromatography (100% hexanes to 25% EtOAc in hexanes) to give 2-(methyloxycarbonyl)amino-4-isopropyl-7-methyl-6-thiocyanato-benzothiazole. MS (APCI): 322 (M+H).

Fuente