作者:Yasuhiro Wada、Harumi Kaga、Shiho Uchiito、Eri Kumazawa、Miho Tomiki、Yu Onozaki、Nobuhito Kurono、Masao Tokuda、Takeshi Ohkuma、Kazuhiko Orito
DOI:10.1021/jo071038y
日期:2007.9.1
For the synthesis of protopine alkaloids, we studied a reaction sequence based on a ring enlargement of indeno[2,1-a][3]benzazepines by a singlet oxygen oxygenation, followed by conversion of an amide carbonyl group of the resultant 10-membered keto-lactam to a methylene group, which is the last step for completion of the synthesis. The key substances, indeno[2,1-a][3]benzazepines, were prepared by
为了合成原松碱生物碱,我们研究了基于单重氧合氧化茚并[2,1- a ] [3]苯并ze庚因的环扩大,然后转化所得的10元酰胺基的反应顺序。酮内酰胺成亚甲基,这是完成合成的最后一步。关键物质茚并[2,1- a ] [3]苯并ze庚因是通过Bischler-Napieralski环化烷氧基取代的1-(2-溴苄基)-3-苯并ze庚因-2-酮制备的。检查了该合成中取代基的立体效应。