反应详情

A solution of 2.5 g (0.015 mol) of 2,3-dimethyl-4-nitropyridine 1-oxide in 50 ml of abs. methanol is treated with 0.883 g of sodium methylate, whereupon the mixture is stirred at room temperature under argon for 2 days. The reaction mixture is concentrated and the residue is extracted with methylene chloride and saturated sodium chloride solution. The methylene chloride phase is dried and evaporated. The residue, crystallized from methylene chloride/ ether, gives 4-methoxy-2,3-dimethylpyridine 1-oxide of melting point 80°-83°.

1. concentrationThe reaction mixture is concentrated
2. extractionthe residue is extracted with methylene chloride and saturated sodium chloride solution
3. dry with materialThe methylene chloride phase is dried
4. customevaporated
5. customThe residue, crystallized from methylene chloride/ ether