Access to Highly Functionalized Cyclopentenones via Diastereoselective Pauson–Khand Reaction of Siloxy-Tethered 1,7-Enynes
作者:Austin G. Gallagher、Huan Tian、Osmar A. Torres-Herrera、Shuai Yin、Anxin Xie、Daniel M. Lange、Jerica K. Wilson、Louis G. Mueller、Michael R. Gau、Patrick J. Carroll、Dionicio Martinez-Solorio
DOI:10.1021/acs.orglett.9b03255
日期:2019.11.1
Pauson–Khand reaction (PKR) of siloxy-tethered 1,7-enynes for the synthesis of cyclopentaoxasilinones has been developed. This transformation can be performed on a multigram scale and is characterized by a broad substrate scope, functional group compatibility, and high chemo- and diastereoselectivity. Oxidation of the resulting cyclopentaoxasilinones delivers stereoenriched β-alkylated cyclopentenones, which
已经开发了一种非对映选择性的Co 2(CO)8介导的甲氧基连接的1,7-烯炔的Pauson-Khand反应(PKR),用于合成环戊四恶烷酮。这种转化可以在数克范围内进行,其特征是具有广泛的底物范围,官能团相容性以及高化学选择性和非对映选择性。氧化所得的环五氧杂环戊烯酮可提供立体富集的β-烷基化的环戊烯酮,这是分子间PKR无法达到的。这项研究为与经典分子间PKR相关的挑战提供了一种实用的解决方案。