(2R,5S)-5-(2,5-dimethyl-2H-pyrazol-3-ylmethyl)-2-methyl-piperazine-1-carboxylic acid tert-butyl ester 、
2-chloro-1-[6-(2,4-difluoro-benzyl)-3,3-dimethyl-2,3-dihydro-pyrrolo[3,2-b]pyridin-1-yl]ethanone hydrochloride 在
potassium carbonate 、 potassium iodide 作用下,
以
乙腈 为溶剂,
以330 mg的产率得到(2R,5S)-4-{2-[6-(2,4-difluorobenzyl)-3,3-dimethyl-2,3-dihydropyrrolo[3,2-b]pyridin-1-yl]-2-oxo-ethyl}-5-(2,5-dimethyl-2H-pyrazol-3-ylmethyl)-2-methyl-piperazine-1-carboxylic acid tert-butyl ester