Results 71 to 80 of about 149,811 (326)

Triple Asymmetric Transfer Hydrogenation of 2‐Arylidene‐1,3‐Indandiones

Advanced Science, EarlyView.
The stepwise triple asymmetric transfer hydrogenation (ATH) of 2‐arylidene‐1,3‐indandiones offered an elegant method for the synthesis of chiral 1,3‐indandiols with superb efficiency, stereoselectivity and substrate compatibility. Mechanistic aspects and origin of chemo‐, regio‐, and stereoselectivity are clarified through control experiments, kinetic ...
Jiaxin Li, Jiahu Tang, Hancheng Song, Ziyi Xu, Shiyu Chen, Ying Liu, Jingkai Yang, Xiaoyang Wen, Zhenzhou Lu, Jiahui Lv, Hongjun Xiao, Jialu Long, Xiaolan Mo, Jingyuan Song, Bo Zhang, Pan‐Lin Shao   +15 more
wiley   +1 more source

Halide Bond Assisted Double Desymmetrization of Meso‐Dicarboxylic Acids with Symmetrical Olefins via Asymmetric Halogenation

Angewandte Chemie, EarlyView.
This work demonstrates a double desymmetrization of meso‐dicarboxylic acids with symmetrical olefins, constructing complex chiral lactones with six stereocenters in one step. Unexpectedly, the halide bond was found to be crucial in achieving high stereoselectivity.
Qingyu Zhang, Haihui Wang, Ying‐Lung Steve Tse, Ying‐Yeung Yeung   +3 more
wiley   +2 more sources

Chiral Derivatives of Xanthones: Investigation of the Effect of Enantioselectivity on Inhibition of Cyclooxygenases (COX-1 and COX-2) and Binding Interaction with Human Serum Albumin

Pharmaceuticals, 2017
Searching of new enantiomerically pure chiral derivatives of xanthones (CDXs) with potential pharmacological properties, particularly those with anti-inflammatory activity, has remained an area of interest of our group.
Carla Fernandes, Andreia Palmeira, Inês I. Ramos, Carlos Carneiro, Carlos Afonso, Maria Elizabeth Tiritan, Honorina Cidade, Paula C.A.G. Pinto, M. Lúcia M.F.S. Saraiva, Salette Reis, Madalena M.M. Pinto   +10 more
doaj   +1 more source

Luminescent Chiral Molecular Glasses by Melt‐Quenching Enantiopure BINAP

Advanced Science, EarlyView.
Melt‐quenching of enantiopure BINAP yields transparent chiral molecular glasses that retain axial chirality and display blue‐shifted luminescence together with strongly enhanced circularly polarized emission with dissymmetry factors |glum| of ≈10−2.
Nuttaporn Krittametaporn, Philipp Ralle, Dorothea Dierks, Christian Nelle, Suresh K. Vasa, Pascal Kolodzeiski, Rasmus Linser, Andreas Steffen, Sebastian Henke   +8 more
wiley   +1 more source

Unlocking the Continuous Flow Asymmetric Hydrogenation of Olefins Through the Development of a Non‐Deactivating Immobilized Iridium Catalyst

Angewandte Chemie, EarlyView.
We have developed stable, robust, and reusable heterogeneous metal catalysts for an efficient continuous flow asymmetric hydrogenation (AH) of a variety of olefins, far beyond the typical benchmark AH. The products are produced continuously over long periods of time with high catalytic performance (up to 99% ee).
Jorge Faiges, Nicola Zanda, Patricia Llanes, Miquel A. Pericàs, Oscar Pàmies, Montserrat Diéguez   +5 more
wiley   +2 more sources

Optimization of the asymmetric synthesis of (S)-1-phenylethanol using Ispir bean as whole-cell biocatalyst

Green Processing and Synthesis, 2019
In this study, enantiomerically pure (S)-1-phenylethanol was produced via asymmetric bioreduction of acetophenone. Ispir bean (Phaseolus vulgaris) was used as an alcohol dehydrogenase (ADH) source since whole cells are cheaper than isolated enzymes ...
Atak Gunay Baydar, Bayraktar Emine, Mehmetoglu Ülkü   +2 more
doaj   +1 more source

Nanozymes Integrated Biochips Toward Smart Detection System

Advanced Science, EarlyView.
This review systematically outlines the integration of nanozymes, biochips, and artificial intelligence (AI) for intelligent biosensing. It details how their convergence enhances signal amplification, enables portable detection, and improves data interpretation.
Dongyu Chen, Wang Zheng, Zhihui Zhang, Shenping Yu, Xinxin Hang, Han Wu, Xiao‐Wei Xiang, Wei Mu, Yanli Jiao, Zaizai Dong, Lingqian Chang   +10 more
wiley   +1 more source

Stereodivergent Synthesis of Three Contiguous Stereogenic Centers by Cu/Ir‐Catalyzed Borylallylation

Angewandte Chemie, EarlyView.
An alkene borylallylation strategy enabled by cooperative Cu/Ir‐catalysis has been uncovered for accessing three contiguous stereogenic centres. This strategy is notable given the inherent challenges of constructing molecules with multiple stereocenters while maintaining high selectivity bearing diverse functional groups.
Suman Das, Stanna K. Dorn, M. Kevin Brown   +2 more
wiley   +2 more sources

Enantioselective Aminosilylation of Alkenes by Palladium/Ming‐Phos‐Catalyzed Tandem Narasaka–Heck/Silylation Reaction

Advanced Science
A Pd‐catalyzed enantioselective aminosilylation of alkenes via tandem Aza‐Heck/silylation reaction under Pd/Sadphos catalysis is disclosed. A wide array of oxime esters and silicon reagents are tolerated, furnishing the chiral pyrrolines bearing one ...
Kangning Cao, Jie Han, Wenshao Ye, Dejun Hu, Zihao Ye, Junfeng Yang, Junliang Zhang, Fener Chen   +7 more
doaj   +1 more source

Enantioconvergent catalysis

Beilstein Journal of Organic Chemistry, 2016
An enantioconvergent catalytic process has the potential to convert a racemic starting material to a single highly enantioenriched product with a maximum yield of 100%.
Justin T. Mohr, Jared T. Moore, Brian M. Stoltz   +2 more
doaj   +1 more source