Thionyl Chloride → Pyridine, 2-(chlorodifluoromethyl)-5-(1-chloroethyl)-
Reaction equation
[Cl:1][C:2]([F:13])([F:12])[C:3]1[N:8]=[CH:7][C:6]([CH:9](O)[CH3:10])=[CH:5][CH:4]=1.S(Cl)([Cl:16])=O>C(Cl)Cl>[Cl:1][C:2]([F:13])([F:12])[C:3]1[CH:4]=[CH:5][C:6]([CH:9]([Cl:16])[CH3:10])=[CH:7][N:8]=1Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
To a solution of 1-{6-[chloro(difluoro)methyl]-pyridin-3-yl}ethanol (0.78 g, 3.77 mmol) in CH2Cl2 (40 mL) was added thionyl chloride (0.54 mL, 7.54 mmol) dropwise at room temperature. After 1 hr, the reaction was quenched slowly with saturated NaHCO3 aqueous solution and the two phases were separated. The organic layer was dried over Na2SO4, filtered, concentrated, and dried in vacuum to give 0.83 g of the crude 2-[chloro(difluoro)methyl]-5-(1-chloroethyl)pyridine (D) as brown oil in 98% yield, which was directly used for the next step reaction. GC-MS: mass calcd for C8H7Cl2F2N [M]+ 225. Found 225.