Reacción #1776

Ecuación de reacción

3-hydroxymethyl-2-methylpyridine

3-Hydroxymethyl-2-methylpyridine

SOCl2

→

3-chloromethyl-2-methylpyridine

Disolventes

CH2Cl2

Condiciones de reacción

Tratamiento posterior

1. 1
   Otrothe solvent and excess SOCl2 were evaporated under reduced pressure
2. 2
   OtroThe residue was partitioned between CH2Cl2 and saturated aqueous NaHCO3
3. 3
   OtroThe organic layer was separated
4. 4
   Lavadothe aqueous layer was washed with additional CH2 Cl2 (2×40 mL)
5. 5
   OtroThe combined organic layers were evaporated under reduced pressure

Procedimiento

To a stirred solution of 3-hydroxymethyl-2-methylpyridine from Step 1 above (1.00 g, 8.13 mmol) in 40 mL of CH2Cl2 at ambient temperature was added SOCl2 (9.0 mL, 123 mmol). The reaction mixture was stirred for 4 hours, and the solvent and excess SOCl2 were evaporated under reduced pressure. The residue was partitioned between CH2Cl2 and saturated aqueous NaHCO3. The organic layer was separated, and the aqueous layer was washed with additional CH2 Cl2 (2×40 mL). The combined organic layers were evaporated under reduced pressure to give 3-chloromethyl-2-methylpyridine as a pale yellow-brown solid (TLC: Rf =0.85 in 5% MeOH in CH2Cl2 ; FAB MS m/z 142 (M+ +H)).

Fuente