[EN] INHIBITORS OF VIRAL REPLICATION, THEIR PROCESS OF PREPARATION AND THEIR THERAPEUTICAL USES [FR] INHIBITEURS DE RÉPLICATION VIRALE, LEUR PROCÉDÉ DE PRÉPARATION ET LEURS UTILISATIONS THÉRAPEUTIQUES
Pd-catalyzed asymmetric Suzuki–Miyaura coupling reactions for the synthesis of chiral biaryl compounds with a large steric substituent at the 2-position
Pd-catalyzed asymmetric Suzuki–Miyauracouplings of 3-methyl-2-bromophenylamides, 3-methyl-2-bromo-1-nitrobenzene and 1-naphthaleneboronic acids have been successfully developed and the corresponding axially chiral biaryl compounds were obtained in very high yields (up to 99%) with good enantioselectivities (up to 88% ee) under mild conditions. The chiral-bridged biphenyl monophosphine ligands developed
Access to Atropisomerically Enriched Biaryls by the Coupling of Aryllithiums with Arynes under Control by Homochiral Oxazolines
作者:Boubacar Yalcouye、Anaïs Berthelot-Bréhier、David Augros、Armen Panossian、Sabine Choppin、Matthieu Chessé、Françoise Colobert、Frédéric R. Leroux
DOI:10.1002/ejoc.201501503
日期:2016.2
We report the preparation of axially stereoenriched biphenyls by the coupling of in situ generated aryllithiums and arynes using chiral oxazoline auxiliaries. The design of the aryne precursors, the choice of oxazoline and the reaction conditions were key to accessing the desired, highly substituted, atropisomerically enriched biarylic products. In one case, the two atropo-diastereomers could be obtained
我们报告了通过使用手性恶唑啉助剂将原位生成的芳基锂和芳烃偶联来制备轴向立体富集的联苯。芳炔前体的设计、恶唑啉的选择和反应条件是获得所需的、高度取代的、富含阻转异构的二芳基产物的关键。在一种情况下,可以通过柱色谱分离和通过 X 射线晶体学建立的绝对构型以异构纯形式获得两种阻滞非对映体。反应的立体选择性似乎受微妙的参数控制。
Palladium-Catalyzed Intramolecular Asymmetric C–H Functionalization/Cyclization Reaction of Metallocenes: An Efficient Approach toward the Synthesis of Planar Chiral Metallocene Compounds
synthesis of planar chiral metallocene compounds is reported. The reaction stereoselectively functionalized one of the ortho C-H bonds of Cp rings by intramolecular cyclization to form indenone derivatives in high yields with excellent enantioselectivity. The mild set of reaction conditions allowed a wide variety of chiral metallocene compounds to be synthesized with broad functional group tolerance. The
Highly Enantioselective Synthesis of Chiral Benzhydrols via Manganese Catalyzed Asymmetric Hydrogenation of Unsymmetrical Benzophenones Using an Imidazole-Based Chiral PNN Tridentate Ligand
A series of Mn(I) catalysts containing imidazole-based chiral PNN tridentate ligands with controllable “side arm” groups have been established, enabling the asymmetricalhydrogenation of unsymmetrical benzophenones with outstanding activity (up to 13 000 TON) and excellent enantioselectivity (up to >99% ee). This protocol uses K2CO3 as an industrially desirable base and features a wide substrate scope
已经建立了一系列含有咪唑基手性PNN三齿配体和可控“侧臂”基团的Mn(I)催化剂,能够使不对称二苯甲酮进行不对称氢化,具有出色的活性(高达13000吨)和出色的对映选择性(高达> 99%ee)。该协议使用K 2 CO 3作为工业上可取的碱,并且具有广泛的底物范围和官能团耐受性。此外,催化剂中的亚胺基对于获得高活性和良好的对映选择性至关重要。
Palladium-catalyzed intramolecular C–H arylation of 2-halo-<i>N</i>-Boc-<i>N</i>-arylbenzamides for the synthesis of N–H phenanthridinones
A palladium catalyzed synthesis of N–H phenanthridinones was developed via C–H arylation. The protocol gives phenanthridinones regioselectively by one-pot reaction without deprotection. It exhibits broad substrate scope and affords targets in up to 95% yields. Importantly, it could be applied for the less reactive o-chlorobenzamides.