Hexadehydro-Diels–Alder (HDDA)-Enabled Carbazolyne Chemistry: Single Step, de Novo Construction of the Pyranocarbazole Core of Alkaloids of the <i>Murraya koenigii</i> (Curry Tree) Family
作者:Tao Wang、Thomas R. Hoye
DOI:10.1021/jacs.6b09628
日期:2016.10.26
Here we report the use of the hexadehydro-Diels-Alder (HDDA) reaction for the de novo construction of a benzenoid ring in fused polycyclic heteroaromatic carbazole (i.e., [2,3]-benzoindole) skeletons. The strategy allows creation of highly substituted benzenoids. We also describe the HDDA-enabled chemical synthesis of the natural product alkaloids mahanimbine and koenidine. Trapping of the intermediate
在这里,我们报告了使用六氢-狄尔斯-阿尔德 (HDDA) 反应在稠合的多环杂芳族咔唑(即 [2,3]-苯并吲哚)骨架中从头构建苯环。该策略允许创建高度取代的苯类。我们还描述了天然产物生物碱 mahanimbine 和 koenidine 的 HDDA 化学合成。用共轭烯醛捕获中间体咔唑炔,通过正式的 [2+2] 环加成、4π-电环开环和 6π-电环闭环事件,构成了生产吡并咔唑的可靠方法。