Method for synthesizing 4-dimethylamino pyridine and analogues thereof

The invention provides a method for synthesizing 4-dimethylamino pyridine and analogues thereof, wherein a reaction formula is shown in the specification, and in the formula: R1 and R2 respectively represents hydrogen, alkyl, alkyl sulfhydrate, phenyl, benzyl, cycloalkyl of -(CH2)n-, or -(CH2)2O(CH2)-, wherein n=2-6. Reaction alkali may be cesium carbonate, potassium phosphate, pyridine, triethylamine, sodium bicarbonate, potash, sodium hydroxide (potassium) and sodium alkoxide (potassium). A reaction solvent may be 1,4- dioxane, toluene, dimethyl sulfoxide, dimethyl formamide, acetonitrile, tetrahydrofuran and acetone. The reaction is carried out by conventional heating. The method has advantages of easily available raw material, simple technology and mild reaction condition.