Thionyl Chloride → 2-[4-(Chloromethyl)-3-methyl-1H-pyrazol-1-YL]pyridine

Participants

Reaction Conditions

Reaction Steps

A mixture of 3-methyl-1-(2-pyridyl)-1H-pyrazol-4-ylmethanol (3.00 g), thionyl chloride (2.5 mL) and toluene (50 mL) was stirred at 70° C. for 2 hrs. The reaction mixture was concentrated under reduced pressure, and saturated aqueous sodium hydrogencarbonate was added to the residue. The mixture was extracted with ethyl acetate, and the ethyl acetate layer was washed with saturated brine, dried over anhydrous magnesium sulfate and concentrated to give 4-chloromethyl-3-methyl-1-(2-pyridyl)-1H-pyrazole (3.10 g, yield 94%) as a colorless oil.

Provenance & Evidence