Reacción #5546

Ecuación de reacción

5-mercaptoimidazo[1,2-a]pyridine

N-[2-(bromo)ethyl]phthalimide

triethylamine

→

desired product

Rendimiento 61.1%

5-[2-(phthalimido)ethylthio]imidazo[1,2-a]pyridine

Rendimiento 61.1%

Disolventes

ethanol

Condiciones de reacción

Tratamiento posterior

1. 1
   Temperaturaheated
2. 2
   Temperaturaat reflux for 4 hours
3. 3
   workup.DISTILLATIONAfter the solvent was distilled off
4. 4
   workup.ADDITIONchloroform was added to the residue, which
5. 5
   Lavadowas washed with water
6. 6
   Secadodried over anhydrous magnesium sulfate
7. 7
   workup.DISTILLATIONthe solvent was distilled off
8. 8
   OtroThen, the residue was purified by column chromatography (eluent: ethyl acetate)

Procedimiento

To a suspension of 5-mercaptoimidazo[1,2-a]pyridine (3.00g, 20 mmoles) and N-[2-(bromo)ethyl]phthalimide (5.59 g, 22 mmoles) in ethanol (200 ml) was added triethylamine (4.2 ml, 30 mmoles) and the mixture was stirred at room temperature for 3 hours and heated at reflux for 4 hours. After the solvent was distilled off, chloroform was added to the residue, which was washed with water, dried over anhydrous magnesium sulfate and the solvent was distilled off. Then, the residue was purified by column chromatography (eluent: ethyl acetate) to obtain 3.95 g of the desired product (61.1%, yellow crystals).

Fuente