A Diastereoselective Total Synthesis of <i>trans</i>-Trikentrin A: A Ring Contraction Approach
作者:Luiz F. Silva、Marcus V. Craveiro
DOI:10.1021/ol8023105
日期:2008.12.4
obtain the polyalkylated indole (+/-)-trans-trikentrin A was developed. The synthesis of this natural alkaloid features a thallium(III)-mediated ring contraction reaction to obtain the trans-1,3-disubstituted five-membered ring in a diastereoselective manner. Thallium(III) is chemoselective in this rearrangement, reacting with the olefin without oxidation of the indole moiety. Other key transformations
开发了获得多烷基化吲哚(+/-)-反式-trikentrin A的新途径。这种天然生物碱的合成具有a(III)介导的环收缩反应,以非对映选择性的方式获得了反式1,3-二取代的五元环。this(III)在这种重排中具有化学选择性,可与烯烃反应而不会氧化吲哚部分。其他关键的转化是构建杂环的巴托利反应和添加可引发非芳香族循环的碳原子的Heck偶联。