Toward the total synthesis of lophotoxin — New methodologies and synthetic strategies
作者:Peter Wipf、Michel Grenon
DOI:10.1139/v06-073
日期:2006.10.1
progress toward the synthesis of the furanocembranolide lophotoxin (1) is disclosed. Strategies for the stereoselective incorporation of the C13 stereocenter by a catalytic desymmetrization of a cyclic meso-anhydride, as well as a novel 1,6-addition reaction of organocuprates to unsaturated [1,3]dioxin-4-ones are discussed. Preliminary results on the development of a rhodium-catalyzed asymmetric 1,6-addition
我们最近在合成呋喃西姆内酯 lophotoxin (1) 方面取得了进展。讨论了通过环状内消旋酸酐的催化去对称化立体选择性结合 C13 立体中心的策略,以及有机铜酸盐与不饱和 [1,3] 二恶英 4-ones 的新型 1,6-加成反应。还提到了开发铑催化的不对称 1,6-加成反应的初步结果。最后,对先前报道的涉及 α-炔丙基 β-酮酯的过渡金属催化环化反应的改进,允许在热条件下或通过微波辐射形成呋喃环。 关键词:1,6-加成,有机铜酸盐,催化去对称化,呋喃环化,微波。