benzyl 4-[(5S)-5-butyl-2-oxo-1-oxa-3,9-diazaspiro[5.5]undecan-9-yl]-4-methylpiperidine-1-carboxylate 、
1-Boc-4-溴甲基哌啶 在
四丁基溴化铵 sodium hydroxide 作用下,
以
甲苯 为溶剂,
反应 72.0h,
以82%的产率得到benzyl (S)-4-(3-((1-(tert-butoxycarbonyl)piperidin-4-yl)methyl)-5-butyl-2-oxo-1-oxa-3,9-diazaspiro[5.5]undecan-9-yl)-4-methylpiperidine-1-carboxylate