Reacción #69111

Ecuación de reacción

5-trifluoromethyl-1-tosyl-1H-pyrrolo[2,3-b]pyridine

bromine

sodium thiosulfate

→

product

Rendimiento 89.1%

3-Bromo-5-Trifluoromethyl-1-tosyl-1H-pyrrolo[2,3-b]pyridine

Rendimiento 89.1%

Disolventes

DCM

bicarbonate

DCM

DCM

Condiciones de reacción

Tratamiento posterior

1. 1
   workup.WAITAfter an hour at room temperature
2. 2
   OtroThe organic layer was separated
3. 3
   Lavadofurther washed with the 50:50 aqueous mixture
4. 4
   Secadodried over magnesium sulfate
5. 5
   Otroevaporated
6. 6
   OtroThe crude yellow solid was triturated with diethyl ether and solid
7. 7
   Otroisolated
8. 8
   Otrodried

Procedimiento

To a stirred solution of 5-trifluoromethyl-1-tosyl-1H-pyrrolo[2,3-b]pyridine (53.7 g, 158 mmol) in DCM (250 mL) was added a solution of bromine (16 mL, 316 mmol) in DCM (50 mL) dropwise. No significant exotherm was observed. After an hour at room temperature, the reaction mixture had thickened and stirring ceased. The reaction was deemed complete by tlc and was diluted with 1.2 litres of DCM and 50:50 saturated bicarbonate: saturated sodium thiosulfate aqueous solution. The organic layer was separated and further washed with the 50:50 aqueous mixture, dried over magnesium sulfate and evaporated. The crude yellow solid was triturated with diethyl ether and solid isolated and dried to give the product as a yellow powder (59 g, 59% yield)

Fuente