Synthesis of Benzo[<i>c</i>]phenanthridine Alkaloids by Pd(OAc)<sub>2</sub>-Induced Direct Aromatic Carbonylation
作者:Eri Kumazawa、Takashi Tokuhashi、Akiyoshi Horibata、Nobuhito Kurono、Hisanori Senboku、Masao Tokuda、Takashi Ohkuma、Kazuhiko Orito
DOI:10.1002/ejoc.201200262
日期:2012.8
The Pd(OAc)2-induced carbonylation of alkoxy-substituted 1-amino-2-phenyltetralins and 1-amino-2-phenylnaphthalenes was examined to provide the benzo[c]phenanthridine ring system. The carbonylation of substrates containing methylenedioxy groups gave oxysanguinarine and oxyavicine. The tetramethoxy derivatives gave O-methyloxyfagaronine. The substrate with a benzyloxy group afforded a known synthetic
Pd(OAc) 2 诱导的烷氧基取代的 1-氨基-2-苯基四氢萘和 1-氨基-2-苯基萘的羰基化被检查以提供苯并 [c] 菲啶环系统。含有亚甲二氧基的底物的羰基化得到氧血金根碱和氧鸟苷。四甲氧基衍生物得到O-甲基氧基法加罗宁。具有苄氧基的底物提供了抗白血病生物碱fagaronine的已知合成前体。