Preparation of Aryloxetanes and Arylazetidines by Use of an Alkyl−Aryl Suzuki Coupling
摘要:
The oxetan-3-yl and azetidin-3-yl substituents have previously been identified as privileged motifs within medicinal chemistry. An efficient approach to installing these two modules into aromatic systems, using a nickel-mediated alkyl-aryl Suzuki coupling, is presented.
A practical route from oxetane or thietane to γ‐(thio)butyrolactone via solvated‐proton‐assisted cobalt‐catalyzed carbonylative ring expansion under syngas atmosphere has been established. A wide variety of γ‐(thio)butyrolactones can be afforded in good to excellent yields. The versatility of this method has been well demonstrated in the synthesis of intermediates towards the natural product Arctigenin
Preparation of Aryloxetanes and Arylazetidines by Use of an Alkyl−Aryl Suzuki Coupling
作者:Matthew A. J. Duncton、M. Angels Estiarte、Darlene Tan、Carl Kaub、Donogh J. R. O’Mahony、Russell J. Johnson、Matthew Cox、William T. Edwards、Min Wan、John Kincaid、Michael G. Kelly
DOI:10.1021/ol8011327
日期:2008.8.7
The oxetan-3-yl and azetidin-3-yl substituents have previously been identified as privileged motifs within medicinal chemistry. An efficient approach to installing these two modules into aromatic systems, using a nickel-mediated alkyl-aryl Suzuki coupling, is presented.
Reductive Opening of Oxetanes Catalyzed by Frustrated Lewis Pairs: Unexpected Aryl Migration via Neighboring Group Participation
作者:Luning Tang、Yu Zang、Wengang Guo、Zhengyu Han、Hai Huang、Jianwei Sun
DOI:10.1021/acs.orglett.2c01088
日期:2022.5.6
B(C6F5)3 was found to catalyze an unusual double reduction of oxetanes by hydrosilane with aryl migration via neighboring group participation. Control experiments suggested that the phenonium ion serves as the key intermediate. Minor modification of this protocol also led to simple hydrosilylative opening of oxetanes.
发现B(C 6 F 5 ) 3催化氢硅烷对氧杂环丁烷的异常双重还原,其中芳基迁移通过相邻基团参与。对照实验表明铼离子是关键的中间体。该协议的微小修改也导致了氧杂环丁烷的简单氢化开环。