作者:Christian Stark、Sabrina Göhler、Stefanie Roth、Huan Cheng、Hülya Göksel、Alexander Rupp、Lars Haustedt
DOI:10.1055/s-2007-983797
日期:2007.9
A highly efficient protocol for the large-scale oxidative cyclization of 1,5-dienes is described. This convenient ruthenium(VIII)-catalyzed (0.2 mol%) cyclization reaction allows the preparation of cis-2,5-disubstituted tetrahydrofurans in high yields (up to 92%) and excellent diastereomeric ratio (>95:5 dr). This simple and reliable method is insensitive to moisture and air and can, therefore, be carried out in an open reaction vessel.
本文介绍了一种高效的大规模1,5-二烯氧化环化协议。这种便捷的钌(VIII)催化(0.2摩尔%)环化反应允许以高产率(高达92%)和优异的非对映异构体比例(>95:5 dr)制备顺式-2,5-二取代四氢呋喃。这种方法简单可靠,对湿气和空气不敏感,因此可以在开放反应容器中进行。