Asymmetric Total Synthesis of Indole Alkaloids Containing an Indoline Spiroaminal Framework
作者:Takeshi Yamada、Tetsuya Ideguchi-Matsushita、Tomoyasu Hirose、Tatsuya Shirahata、Rei Hokari、Aki Ishiyama、Masato Iwatsuki、Akihiro Sugawara、Yoshinori Kobayashi、Kazuhiko Otoguro、Satoshi Ōmura、Toshiaki Sunazuka
DOI:10.1002/chem.201501150
日期:2015.8.10
of a reverse prenyl group to the congested benzylic carbon of furoindoline, a two‐pot transformation of indoline (containing three nitrogen atoms at appropriate positions) to the featured indoline spiroaminal framework, and elimination of carbonate assisted by the adjacent imidazole moiety to construct the (E)‐dehydrohistidine. The absolute stereochemistry of neoxaline was elucidated through our total
吲哚生物碱,neoxaline,oxaline和meleagrin A的全部合成都包含独特的二氢吲哚螺环骨架,这是通过将反向异戊二烯基立体选择性地引入呋喃二氢吲哚的拥挤苄基碳中而完成的,这是吲哚的两锅法(在适当的二氢吲哚螺氨基骨架上在适当的位置包含三个氮原子),并通过相邻的咪唑部分协助消除碳酸根以构建(E)-脱氢组氨酸。通过我们的总合成可以阐明新氧沙林的绝对立体化学。此外,我们评估了新沙星和草酸星以及某些合成中间体的生物活性,尤其是抗感染特性。