通过可见光光催化双碳-碳键断裂和多碳-氢键氧化,独特地进行了伯胺的无金属好氧氧化。通过使用具有18 W CFL的二恶烷,可以控制伯胺的好氧氧化,以提供酸;通过使用具有8 W绿色LED的DMF,可以分别控制内酯的内酯。在控制实验的基础上,提出了一个合理的机制。该观察结果为脂肪族伯胺的好氧氧化中的碎片化提供了直接证据。
Enantioselective Cross-Coupling of <i>meso</i>-Epoxides with Aryl Halides
作者:Yang Zhao、Daniel J. Weix
DOI:10.1021/jacs.5b01909
日期:2015.3.11
The first enantioselective cross-electrophile coupling of aryl bromides with meso-epoxides to form trans-β-arylcycloalkanols is presented. The reaction is catalyzed by a combination of (bpy)NiCl2 and a chiral titanocene under reducing conditions. Yields range from 57 to 99% with 78–95% enantiomeric excess. The 30 examples include a variety of functional groups (ether, ester, ketone, nitrile, ketal
The disclosure generally relates to compounds of formula I, including their salts, as well as compositions and methods of using the compounds. The compounds are ligands of the NR2B receptor and may be useful for the treatment of various disorders of the central nervous system.
Palladium-catalyzed asymmetric hydrogenation of 2-aryl cyclic ketones for the synthesis of <i>trans</i> cycloalkanols through dynamic kinetic resolution under acidic conditions
The first efficient palladium-catalyzed asymmetric hydrogenation of 2-aryl cyclic ketones has been described through dynamickineticresolution under acidic conditions, providing a facile access to chiral trans cycloalkanol derivatives with excellent enantioselectivities.
Determination of absolute configuration of trans-2-arylcyclohexanols using remarkable aryl-induced 1H NMR shifts in diastereomeric derivatives
作者:Masato Matsugi、Kinuyo Itoh、Masatomo Nojima、Yuri Hagimoto、Yasuyuki Kita
DOI:10.1016/s0040-4039(01)01409-5
日期:2001.9
A facile determination of the absoluteconfiguration of trans-2-arylcyclohexanols was achieved. It takes advantage of the observations of the remarkable aryl-induced 1H NMR shifts that seems to be ascribable to the discrimination of the diastereo-environment between intermediary optically active diastereomers by intramolecular CH/π interaction.
轻而易举地确定了反式-2-芳基环己醇的绝对构型。它利用了明显的芳基诱导的1 H NMR位移的观察结果,这似乎归因于分子内CH /π相互作用对中间旋光非对映异构体之间非对映环境的区分。
Synthesis of an enantiopure 2-arylcyclohexanols from prochiral enol acetates by an enantioselective protonation/diastereoselective reduction sequence
substituents on the aromatic ring are converted into the corresponding trans-2-arylcyclohexanols by diastereoselective reduction with sodium naphthalenide in the presence of acetamide. The stereochemical integrity of the tertiary stereocenter is fully preserved using this reduction procedure. Interestingly, the chiral proton source is not consumed in the synthesis.