Stereoselective synthesis of the tetracyclic core of manzamine via the vinylogous amide photocycloaddition cascade
作者:Jeffrey D. Winkler、Jeffrey Axten、Abdel Hakim Hammach、Young-Shin Kwak、Urs Lengweiler、Melissa J. Lucero、K.N. Houk
DOI:10.1016/s0040-4020(98)00346-9
日期:1998.6
The stereoselective preparation of the tetracyclic core of the manzamine alkaloids via the intramolecular vinylogous amide photocycloaddition/retro-Mannich fragmentation/Mannich closure cascade is described. The striking effect of unsaturation in the eight-membered ring on the stereoselectivity of the cycloaddition and a computational analysis of these results are presented.
描述了通过分子内乙烯基酰胺光环加成/复古-曼尼希裂解/曼尼希封闭级联反应对甘露糖碱生物碱的四环核的立体选择性制备。给出了八元环中不饱和键对环加成反应立体选择性的惊人影响,并对这些结果进行了计算分析。