dimethyl N-(2-iodo-1-triphenylmethylimidazol-4-ylcarbonyl)-L-glutamate 、
2-pivaloyl-4-oxo-6-ethynylpyrido<2,3-d>pyrimidine 、 、 、
三乙胺 以
乙腈 为溶剂,
以yield dimethyl N-(2-[2-(2-pivaloylamino-4-hydroxypyrido[2,3-d]pyrimidin-6-yl)ethynyl]-1-triphenylmethylimidazol-4-ylcarbonyl}-L-glutamate [515 mg, 66% after flash column chromatography (ethyl acetate:hexanes, 2:1), mp 93-95° C]的产率得到dimethyl N-{2-[2-(2-Pivaloylamino-4-hydroxypyrido[2,3-d]pyrimidin-6-yl)ethynyl]-1-triphenylmethylimidazol-4-ylcarbonyl}-L-glutamate