A PtII-catalyzed intramolecular chemo- and regioselective pentannulation/long-range 1,5-acyl migration reaction is described. This cascade cycloisomerization protocol produces a wide variety of benzofulvene diketones in good to excellent yields with exclusively the Z configuration of the exocyclic double bond of the final product. The 18O isotope experiment together with 13C NMR, HRMS, and HMBC analyses
描述了Pt II催化的分子内
化学和区域选择性戊环/长距离1,5-酰基迁移反应。该级联环异构化方案以最终产品的外环双键的Z构型唯一的Z构型,以良好至极佳的收率生产了多种苯并
富勒烯二酮。在18带O同位素实验一起13 C NMR,HRMS,和HMBC分析在这一转变确认一个有趣的远距离酰基重排的过程。