[NH2:1][C:2]1[C:3]([Cl:9])=[N:4][CH:5]=[CH:6][C:7]=1[CH3:8]>C(Cl)Cl>[NH2:1][C:2]1[C:3]([Cl:9])=[N:4][CH:5]=[CH:6][C:7]=1[C:8]1[CH:5]=[CH:6][CH:7]=[CH:2][CH:3]=1adjusting the pH of the aqueous phase to between 3.5 and 5 by the addition of a base, and isolating the 3-amino-2-chloro-4-methyl-pyridine so produced by extraction into methylene chloride, followed by evaporation of the methylene chloride.
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