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。
[EN] MONOPHOSPHORUS LIGANDS AND THEIR USE IN CROSS-COUPLING REACTIONS<br/>[FR] LIGANDS À UN ATOME DE PHOSPHORE ET LEUR UTILISATION DANS DES RÉACTIONS DE COUPLAGE CROISÉ
申请人:BOEHRINGER INGELHEIM INT
公开号:WO2011126917A1
公开(公告)日:2011-10-13
Phosphine ligands of the formula Ia, IB and mixtures thereof.
化学配体的化学式Ia、IB及其混合物。
Synthesis of Chiral α-Amino Tertiary Boronic Esters by Enantioselective Hydroboration of α-Arylenamides
rhodium-catalyzed asymmetric hydroboration of α-arylenamides with BI-DIME as the chiral ligand and (Bpin)2 as the reagent yields for the first time a series of α-amino tertiaryboronicesters in good yields and excellent enantioselectivities (up to 99% ee).
NOVEL CHIRAL DIHYDROBENZOOXAPHOSPHOLE LIGANDS AND SYNTHESIS THEREOF
申请人:Boehringer Ingelheim International GmbH
公开号:US20180155375A1
公开(公告)日:2018-06-07
This invention relates to novel phosphorous ligands useful for organic transformations. Methods of making and using the ligands in organic synthesis are described. The invention also relates to processes for preparing the novel ligands.
A novel ruthenium catalyst on the basis of a chiral monophosphorus ligand is efficient for the asymmetricaddition of arylboronicacids to aryl aldehydes, providing a series of chiral diarylmethanols in excellent yields and enantioselectivities (up to 92% ee). Preliminary study has shown that this process is catalyzed by a Ru complex with a single monophosphorus ligand.