Efficient Syntheses of Korupensamines A, B and Michellamine B by Asymmetric Suzuki-Miyaura Coupling Reactions
作者:Guangqing Xu、Wenzhen Fu、Guodu Liu、Chris H. Senanayake、Wenjun Tang
DOI:10.1021/ja409669r
日期:2014.1.15
Efficient asymmetricSuzuki-Miyauracouplingreactions are employed for the first time in total syntheses of chiral biaryl natural products korupensamine A and B in combination with an effective diastereoselective hydrogenation, allowing ultimately a concise and stereoselective synthesis of michellamine B. Chiral monophosphorus ligands L1-3 are effective for the syntheses of a series of functionalized
高效的不对称 Suzuki-Miyaura 偶联反应首次用于手性联芳基天然产物 korupensamine A 和 B 的全合成,并结合有效的非对映选择性氢化,最终实现了米歇尔胺 B 的简洁立体选择性合成。 手性单磷配体 L1-3通过不对称 Suzuki-Miyaura 偶联反应以优异的产率和对映选择性(高达 99% ee)合成一系列官能化手性联芳基化合物是有效的。高度极化的 BOP 基团与芳基硼酸偶联物的扩展 π 系统之间存在极性-π 相互作用被认为对于高对映选择性很重要。
An Efficient Method for Sterically Demanding Suzuki-Miyaura Coupling Reactions
作者:Qing Zhao、Chengxi Li、Chris H. Senanayake、Wenjun Tang
DOI:10.1002/chem.201203898
日期:2013.2.11
An efficientmethod for sterically demanding Suzuki–Miyauracoupling reactions has been developed with two catalysts, Pd/BI‐DIME (see scheme) and Pd/phenanthrene‐based ligand. The Pd/BI‐DIME catalyst facilitates the syntheses of extremely hindered biaryls bearing ortho‐isopropyl substituents. The other catalyst is efficient for the synthesis of functionalized tetra‐ortho‐substituted biaryls at low
Efficient Chiral Monophosphorus Ligands for Asymmetric Suzuki–Miyaura Coupling Reactions
作者:Wenjun Tang、Nitinchandra D. Patel、Guangqing Xu、Xiaobing Xu、Jolaine Savoie、Shengli Ma、Ming-Hong Hao、Santosh Keshipeddy、Andrew G. Capacci、Xudong Wei、Yongda Zhang、Joe J. Gao、Wenjie Li、Sonia Rodriguez、Bruce Z. Lu、Nathan K. Yee、Chris H. Senanayake
DOI:10.1021/ol300659d
日期:2012.5.4
A series of novel P-chiral monophosphorus ligands exhibit efficiency in asymmetric Suzuki–Miyaura coupling reactions, enabling the construction of an array of chiral biaryl products in high yields and excellent enantioselectivities (up to 96% ee) under mild conditions. The carbonyl-benzooxazolidinone moiety in these chiral biaryl products allows facile derivatization for further synthetic applications
Rhodium(II)‐Catalyzed Dehydrogenative Silylation of Biaryl‐Type Monophosphines with Hydrosilanes
作者:Dingyi Wang、Yunfei Zhao、Chengkai Yuan、Jian Wen、Yue Zhao、Zhuangzhi Shi
DOI:10.1002/anie.201906975
日期:2019.9.2
situ modification of biaryl-type monophosphines with hydrosilanes through a PIII -chelation-assisted dehydrogenative silylation reaction. A series of ligands containing silyl groups with different steric and electronic properties were obtained with excellent regioselectivities. This method offers many advantages, including the use of commercially available phosphines, no requirement for an external ligand
asymmetric Suzuki–Miyauracoupling. By virtue of the coupling with dialkoxyphosphinyl substituted naphthyl bromides and 2-nitronaphthalen-1-yl triflouromethanesulfonate, a series of novel multifunctionalized axially chiral biaryls were prepared in 53–97% yields with up to 97% ee using palladium-Cy-MOP as the catalyst. The methodology provides a highly efficient and practical strategy for the synthesis of novel