Reacción #8728

Ecuación de reacción

2,5-dichlorothiophene-3-sulfonyl chloride

sulfur monochloride

water

→

solid

2.4.5-Trichloro-thiophene-3-sulfonyl chloride

Disolventes

sulfuryl chloride

sulfuryl chloride

Condiciones de reacción

Tratamiento posterior

1. 1
   workup.ADDITIONwas added dropwise
2. 2
   TemperaturaThe reaction was heated at 60° C. for an additional 3 hours, at which time it
3. 3
   Temperaturato cool to ambient temperature
4. 4
   Extracciónthe reaction extracted with dichloromethane (2×20 mL)
5. 5
   LavadoThe combined organic layers were washed with saturated sodium bicarbonate solution
6. 6
   Secadodried (Mg2SO4)
7. 7
   Concentraciónconcentrated

Procedimiento

A mixture of 2,5-dichlorothiophene-3-sulfonyl chloride (1.2 g, 5 mmol) and sulfur monochloride (10 mg) in sulfuryl chloride (500 mg) was heated at 60° C. for 30 min, at which time was added dropwise a mixture of aluminum trichloride (10 mg) in sulfuryl chloride (500 mg). The reaction was heated at 60° C. for an additional 3 hours, at which time it was allowed to cool to ambient temperature. Cold water (20 mL) was added and the reaction extracted with dichloromethane (2×20 mL). The combined organic layers were washed with saturated sodium bicarbonate solution, dried (Mg2SO4) and concentrated to furnish a tan solid (420 mg, 33%).

Fuente