Transannular Cyclization of Epoxycaryophyllenes Catalyzed by TiIII: An Efficient Synthesis of Tricyclo[6.3.0.02,5]undecanes
作者:Alejandro F. Barrero、M. Mar Herrador、José F. Quílez del Moral、Pilar Arteaga、Elena M. Sánchez、Jesús F. Arteaga、Maria Piedra
DOI:10.1002/ejoc.200600159
日期:2006.8
The transannular cyclization of epoxycaryophyllenes 2–7 catalyzed by TiIII has been investigated. This cyclization led to alcohols 8–15, all of them possessing a tricyclo[6.3.0.02,5]undecane skeleton. All of these compounds present pleasant aromatic properties. The cyclization takes place with high yields (> 80 %) and via the αα or ββ conformation of the intermediate radical I. (© Wiley-VCH Verlag
已经研究了由 TiIII 催化的环氧石竹烯 2-7 的跨环环化。这种环化导致醇 8-15,它们都具有三环 [6.3.0.02,5] 十一烷骨架。所有这些化合物都具有令人愉悦的芳香特性。通过中间基团 I 的 αα 或 ββ 构象,环化以高产率 (> 80 %) 发生。 (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)