De novo synthesis of a galacto-papulacandin moiety via an iterative dihydroxylation strategy
作者:Md. Moinuddin Ahmed、George A. O’Doherty
DOI:10.1016/j.tetlet.2005.04.073
日期:2005.6
A short and highly efficient route to both the pyranose and furanose forms of a galacto-papulacandin ring system has been developed. The key to the overall transformation is the sequential two osmium-catalyzed dihydroxylation reactions of substituted 2,4-dienone. The resulting tetrol can be efficiently transformed into the two spiroketal moieties of galacto-papulacandin, which can also be inter-converted
已经开发出短促且高效的途径,以半乳糖-帕普拉丹定环系统的吡喃糖和呋喃糖形式。整体转化的关键是取代的2,4-二烯酮连续两次two催化的二羟基化反应。所得的四氢萘酚可有效地转化为半乳糖-帕普拉汀的两个螺酮基部分,它们也可通过酸催化的平衡相互转化。