Electron-Transfer-Induced Intermolecular [2 + 2] Cycloaddition Reactions Based on the Aromatic “Redox Tag” Strategy
作者:Yohei Okada、Asaki Nishimoto、Ryoichi Akaba、Kazuhiro Chiba
DOI:10.1021/jo200490q
日期:2011.5.6
Novel electron-transfer-induced intermolecular [2 + 2] cycloaddition reactions between an aliphatic cyclic enol ether and several unactivated olefins have been demonstrated on the basis of the aromatic “redox tag” strategy. The aromatic “redox tag” was oxidized during the formation of the cyclobutane ring, affording the relatively long-lived aromatic radical cation, which was then reduced to complete
在芳香族“氧化还原标签”策略的基础上,已经证明了脂族环状烯醇醚与几种未活化烯烃之间新型的电子转移诱导的分子间[2 + 2]环加成反应。芳族“氧化还原标签”在环丁烷环形成过程中被氧化,提供了相对较长寿命的芳族自由基阳离子,然后将其还原以完成构成相应[2 + 2]环加合物的整个反应。还发现芳香族的“氧化还原标签”促进了电子转移引起的环丁烷环的环还原反应。