6-BOC-2,6-二氮杂螺[4.4]壬-1-酮 、
5-溴-2-硝基吡啶 以gave 7-(6-nitro-pyridin-3-yl)-6-oxo-1,7-diaza-spiro[4,4]nonane-1-carboxylic acid tert-butyl ester (1.55 g) in 79% yield的产率得到7-(6-nitropyridin-3-yl)-6-oxo-1,7-diazaspiro[4.4]nonane-1-carboxylic acid tert-butyl ester