1,2,3,4,4a,5,6,7-八氢-2,2,4a,7,7-五甲基萘啶 、
benzyl (1S,2S,3S,6R,7S)-3-[(1R)-1-hydroxyethyl]-4,9-dioxo-10-oxa-5-azatricyclo[5.3.0.02,5]decane-6-carboxylate 在
palladium on activated charcoal
氢气 作用下,
以
四氢呋喃 为溶剂,
反应 0.33h,
以65%的产率得到2,2,4a,7,7-pentamethyl-3,4,5,6-tetrahydro-1H-1,8-naphthyridin-8-ium;(1S,2S,3S,6R,7S)-3-[(1R)-1-hydroxyethyl]-4,9-dioxo-10-oxa-5-azatricyclo[5.3.0.02,5]decane-6-carboxylate