Showing 201 - 220 results of 241 for search '"asymmetric catalysis"', query time: 0.09s Refine Results
  1. 201

    Chiral recognition in contact ion-pairs; observation, characterization and analysis by Raskatov, J, Thompson, A, Cowley, A, Claridge, T, Brown, J

    Published 2013
    “…Chiral ion-pairs are playing an increasingly important role in asymmetric catalysis. In order to understand the source of molecular recognition, a simple model system based on a BINAP-Rh(dialkene) cation and a BINOL borate anion was studied for both diastereomeric forms. …”
    Journal article
  2. 202

    Absolute Configuration of In Situ Crystallized (+)-γ-Decalactone by Michael Patzer, Nils Nöthling, Richard Goddard, Christian W. Lehmann

    Published 2021-04-01
    “…In favorable cases, this method of absolute configuration determination of pure liquid (bioactive) agents or liquid products from asymmetric catalysis is a convenient alternative to conventional methods of absolute structure determination, such as optical rotatory dispersion, vibrational circular dichroism, ultraviolet-visible spectroscopy, use of chiral shift reagents in proton NMR and Coulomb explosion imaging.…”
    Get full text
    Article
  3. 203
  4. 204

    Photocatalysis Based on Metal Halide Perovskites for Organic Chemical Transformations by Metikoti Jagadeeswararao, Raquel E. Galian, Julia Pérez-Prieto

    Published 2023-12-01
    “…The review further investigates the impact of crystal engineering on photocatalytic activity, spanning a diverse array of organic transformations, such as C–X bond formation (X = C, N, and O), [2 + 2] and [4 + 2] cycloadditions, substrate isomerization, and asymmetric catalysis. This study provides insights to propel the advancement of metal halide perovskite-based photocatalysts, thereby fostering innovation in organic chemical transformations.…”
    Get full text
    Article
  5. 205

    Enhancing the Efficacy of Chiral Ligands and Catalysts: Siloxane-Substituted Oxazoline Ferrocenes as Next-Generation Candidates by Li Dai, Li Zhao, Di Xu, Chen Yang, Xin-Kuan Zhang

    Published 2024-02-01
    “…It encompasses the synthesis of crucial precursors and desired products, highlights their achievements in asymmetric catalysis reactions, and delves into the exploration of the derivatization of these compounds, emphasizing the introduction of ionophilic groups and their impact on the recovery of transition metal catalysts. …”
    Get full text
    Article
  6. 206

    Condensation and asymmetric amplification of chirality in achiral molecules adsorbed on an achiral surface by Huiru Liu, Heping Li, Yu He, Peng Cheng, Yi-Qi Zhang, Baojie Feng, Hui Li, Kehui Wu, Lan Chen

    Published 2023-04-01
    “…Our observations provide insight into the physicochemical origin of homochirality through surface adsorption and suggest a general phenomenon that can influence enantioselective chemical processes such as chiral separations and heterogeneous asymmetric catalysis.…”
    Get full text
    Article
  7. 207

    Computational Insight into the Rope-Skipping Isomerization of Diarylether Cyclophanes by Thomas J. Summers, Hrishikesh Tupkar, Tyler M. Ozvat, Zoë Tregillus, Kenneth A. Miller, Nathan J. DeYonker

    Published 2021-11-01
    “…This work will likely guide the design and synthesis of novel asymmetric cyclophanes that will be of interest in the catalysis community given the importance of atropisomeric ligands in the field of asymmetric catalysis.…”
    Get full text
    Article
  8. 208

    Iron nitrosyl complexes and their applications in organic catalysis by Wang, Yang

    Published 2018
    “…Inspired by the initial results in asymmetric catalysis, we find a new strategy to produce chiral allenes through asymmetric decarboxylative isomerization of cyclic alkynal carbonates catalyzed by an iron nitrosyl-chiral bisguanidinium ion pairs. …”
    Get full text
    Thesis
  9. 209

    Mechanistic studies on transition metal complex catalysed homogeneous hydrogenation by Sharma, U, Sharma, Uma Devi

    Published 1996
    “…<p>The development of systems capable of catalysing the reduction of unsaturated bonds with very high selectivities is one of the greatest successes of asymmetric catalysis. The mechanism by which rhodium complexes catalyse alkene hydrogenation has been effectively established through a combination of kinetic studies and isolation and characterisation of the intermediates in solution. …”
    Thesis
  10. 210

    Catalytic enantioselective synthesis of heterobiaryl atropisomers by Surgenor, R

    Published 2021
    “…Heterobiaryl atropisomers comprise a privileged class of compounds whose applications span the fields of medicinal chemistry, asymmetric catalysis and materials science. In particular, axially chiral indoles have recently emerged as an important member of the atropisomeric heterobiaryl family. …”
    Thesis
  11. 211

    Chiral Quaternary Ammoniums Derived from Dehydroabietylamine: Synthesis and Application to Alkynylation of Isatin Derivatives Catalyzed by Silver by Guanyu Jiang, Xinduo Sun, Fanrui Zhou, Kun Liang, Qian Chen

    Published 2021-12-01
    “…Its utilities in asymmetric catalysis remain to be explored. A series new amide-type chiral quaternary ammoniums bearing dehydroabietylamine were designed, and prepared by two convenient steps. …”
    Get full text
    Article
  12. 212

    Continuous flow enantioselective processes catalysed by cinchona alkaloid derivatives by Elisabete P. Carreiro, Anthony J. Burke, Gesine J. Hermann, Hans-Jürgen Federsel

    Published 2023-12-01
    “…Without a doubt, asymmetric catalysis has been significantly enriched by the introduction of cinchona alkaloid derivatives. …”
    Get full text
    Article
  13. 213

    Recent Progress in the Mechanism and Engineering of α/β Hydrolases for Chiral Chemical Production by Mingzhe Qiu, Sheng Dong, Qiu Cui, Yingang Feng, Jinsong Xuan

    Published 2023-01-01
    “…Chiral compounds are valuable industrial products and intermediates, and the production of chemicals with high enantiopurity is one of the major objects in asymmetric catalysis. Compared with traditional chemical synthesis, enzymatic synthesis can produce chiral molecules under sustainable conditions which are much greener, more economical, and more environmentally friendly. …”
    Get full text
    Article
  14. 214
  15. 215

    Evidence for Simultaneous Dearomatization of Two Aromatic Rings under Mild Conditions in Cu(I)-Catalyzed Direct Asymmetric Dearomatization of Pyridine by Gribble, Michael W., Liu, Richard Y., Buchwald, Stephen L.

    Published 2022
    “…In this pathway, the CuL2 fragment subsequently mediates a stepwise Cope rearrangement of the doubly dearomatized intermediate to the give the C4-functionalized 1,4-dihydropyridine, lowering a second barrier that would otherwise prohibit efficient asymmetric catalysis.…”
    Get full text
    Article
  16. 216

    Control on dimensions and supramolecular chirality of self-assemblies through light and metal ions by Liu, Guofeng, Sheng, Jianhui, Teo, Wei Liang, Yang, Guangbao, Wu, Hongwei, Li, Yongxin, Zhao, Yanli

    Published 2020
    “…The rational design of building blocks for the construction of dimension and chirality controllable self-assembly systems may lead to versatile applications in smart display, advanced optoelectronic device, and supramolecular asymmetric catalysis.…”
    Get full text
    Journal Article
  17. 217

    Enantioselective addition-alkylation reactions via bisguanidinium silicate ion pair catalysis by Chen, Wen Chao

    Published 2020
    “…Motivated by the concept of ion-pairing, the work described in this thesis proved the potential application of the bisguanidinium silicate ion pair in asymmetric catalysis. In Chapter 2, the high enantioselective reduction-alkylation and reduction-addition of chromones and coumarins was realized through bisguanidinium silicate ion-pairing catalysis. …”
    Get full text
    Thesis-Doctor of Philosophy
  18. 218

    Copper-catalyzed intermolecular formal (5 + 1) annulation of 1,5-diynes with 1,2,5-oxadiazoles by Can-Ming Chen, Ye-Nan Yang, Yin-Zhu Kong, Bo-Han Zhu, Peng-Cheng Qian, Bo Zhou, Long-Wu Ye

    Published 2023-09-01
    “…However, these protocols have to rely on the use of hazardous and not easily accessible diazo compounds as precursors, and examples of the relevant asymmetric catalysis have not been reported. Here we show that a copper-catalyzed intermolecular formal (5 + 1) annulation of 1,5-diynes with 1,2,5-oxadiazoles involving one-carbon insertion into the heterocyclic N−O bond via non-diazo approach. …”
    Get full text
    Article
  19. 219

    Atroposelective hydroarylation of biaryl phosphines directed by phosphorus centres by Zexian Li, Minyan Wang, Youqing Yang, Yong Liang, Xiangyang Chen, Yue Zhao, K. N. Houk, Zhuangzhi Shi

    Published 2023-12-01
    “…This reaction mode significantly expands the pool of enantiomerically enriched functional phosphines, some of which have shown excellent efficiency for asymmetric catalysis.…”
    Get full text
    Article
  20. 220

    Recent progress in the design, synthesis and applications of chiral metal-organic frameworks by Amna Altaf, Sadia Hassan, Bobby Pejcic, Nadeem Baig, Zakir Hussain, Manzar Sohail

    Published 2022-10-01
    “…CMOFs find potential applications in adsorption, asymmetric catalysis, luminescence, degradation, and enantioselective separation. …”
    Get full text
    Article