Reacción #2857

Ecuación de reacción

5H-Thieno[3,2-c]pyridin-4-one

phosphorous oxy chloride

→

title compound

4-Chloro-thieno[3,2-c]pyridine

Condiciones de reacción

Tratamiento posterior

1. 1
   Concentraciónthe solution is concentrated
2. 2
   workup.DISSOLUTIONThe residue is dissolved in CH2 Cl2
3. 3
   LavadoThe resulting solution is washed with water and saturated NaCl
4. 4
   SecadoThe organic layer is dried over MgSO4
5. 5
   Filtraciónfiltered
6. 6
   Concentraciónconcentrated
7. 7
   OtroThe crude product is purified by column chromatography
8. 8
   Lavadoeluting with a gradient of 40% CH2Cl2 /hexanes to 60% CH2Cl2 /hexanes

Procedimiento

5H-Thieno[3,2-c]pyridin-4-one (1.0 g, 6.62 mmol) is dissolved in 30 mL of phosphorous oxy chloride. The solution is heated to 100° C. After 4 h, the solution is concentrated. The residue is dissolved in CH2 Cl2. The resulting solution is washed with water and saturated NaCl. The organic layer is dried over MgSO4, filtered and concentrated. The crude product is purified by column chromatography eluting with a gradient of 40% CH2Cl2 /hexanes to 60% CH2Cl2 /hexanes. The title compound (1.0 g, 5.8 mmol) is obtained as a white solid.

Fuente