反应详情

6-Amino-5-methyl-nicotinonitrile (0.250 g, 1.88 mmol) was dissolved in 2.5 ml of abs. THF and treated at 0° C. with sodium hexamethyldisilazide-solution (1M in THF, 2.07 ml, 1.1 eq.) and, after 5 Min., 3 eq. of methyl iodide (0.35 ml). The mixture was allowed to react for 3 h at ambient temperature. Pouring onto crashed ice/NH4Cl, twofold extraction with AcOEt, washing with water, drying over sodium sulfate, and evaporation of the solvents, followed by flash chromatography (silica gel, hexane/AcOEt=6/4) produced 0.225 g of the title compound as off-white solid.

1. customto react for 3 h at ambient temperature
2. additionPouring
3. extractionice/NH4Cl, twofold extraction with AcOEt
4. washwashing with water
5. dry with materialdrying over sodium sulfate, and evaporation of the solvents