(R)-3-(6-Amino-pyridin-3-yl)-2-oxo-1-oxa-3,8-diaza-spiro[4.6]undecane-8-carboxylic acid tert-butyl ester 、
2-氯-7-环戊基-N,N-二甲基-7H-吡咯并[2,3-d]嘧啶-6-甲酰胺 以gave (R)-3-[6-(7-Cyclopentyl-6-dimethylcarbamoyl-7H-pyrrolo[2,3-d]pyrimidin-2-ylamino)-pyridin-3-yl]-2-oxo-1-oxa-3,8-diaza-spiro[4.6]undecane-8-carboxylic acid tert-butyl ester as a white solid (0.175 g, 0.272 mmol) in 66% yield的产率得到(R)-3-[6-(7-cyclopentyl-6-dimethylcarbamoyl-7H-pyrrolo[2,3-d]pyrimidin-2-ylamino)pyridin-3-yl]-2-oxo-1-oxa-3,8-diazaspiro[4.6]undecane-8-carboxylic acid tert-butyl ester