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。
Synthesis of Chiral-Bridged Atropisomeric Monophosphine Ligands with Tunable Dihedral Angles and their Applications in Asymmetric Suzuki-Miyaura Coupling Reactions
construction of diastereomeric biaryl monophosphines by means of the substrate-directed asymmetric annulation reactions. A series of new chiral-bridged atropisomeric biphenyl monophosphine ligands with tunable dihedral angles was accordingly synthesized successfully without a resolution step being needed. Using these ligands, different kinds of axially chiral 1,1′-biaryl-2-phosphonates including the first
Synthesis of Chiral Biphenyl Monophosphines as Ligands in Enantioselective Suzuki–Miyaura Coupling
作者:Hong-Yu Qu、Wen-Hua Zheng
DOI:10.1021/acs.orglett.3c03487
日期:2023.12.29
Herein, we describe our design and synthesis of novel chiralmonophosphineligands by the short-step addition of chiral lactates as side chains to the well-known ligand SPhos/RuPhos. The new chiralligands were shown to be highly efficient in palladium-catalyzed Suzuki–Miyaura coupling, providing a series of axially chiral biphenyl products in high yield and high enantioselectivity. Furthermore, the