Results 81 to 90 of about 3,273,294 (390)

Enantioselective synthesis and application to the allylic imidate rearrangement of amine-coordinated palladacycle catalysts of cobalt sandwich complexes [PDF]

, 2013
The reaction of (η5-(N,N-dimethylaminomethyl)cyclopentadien-yl)(η4-tetraphenylcyclobutadiene)cobalt with sodium tetrachloropalladate and (R)-N-acetylphenylalanine gave planar chiral palladacycle di-μ-chloridebis[(η5-(Sp)-2-(N,N-dimethylaminomethyl ...
Cassar, Doyle J., Hughes, David L., Ilyashenko, Gennadiy, Ismail, Muhammad, Richards, Christopher J., Woods, James   +5 more
core   +1 more source

Quantitative Prediction on the Enantioselectivity of Multiple Chiral Iodoarene Scaffolds Based on Whole Geometry [PDF]

arXiv, 2021
The mechanistic underpinnings of asymmetric catalysis at atomic levels provide shortcuts for developing the potential value of chiral catalysts beyond the current state-of-the-art. In the enantioselective redox transformations, the present intuition-driven studies require a systematic approach to support their intuitive idea.
arxiv  

Halide Perovskite Photocatalysts for Clean Fuel Production and Organic Synthesis: Opportunities and Challenges

Advanced Materials, EarlyView.
This review provides the state‐of‐the‐art overview of halide perovskite‐based photocatalysts for hydrogen production from water and halogen acid solutions, CO2 reduction into value‐added chemicals, and organic chemical transformations. Different types of halide perovskite photocatalysts and their relative efficiencies for hydrogen generation and CO2 ...
Siddharth Singh, Zeinab Hamid, Ramavath Babu, Sergio Gómez‐Graña, Xiaowen Hu, Iain McCulloch, Robert L. Z. Hoye, Vishal Govind Rao, Lakshminarayana Polavarapu   +8 more
wiley   +1 more source

Stereoselective Construction of Tertiary Homoallyl Alcohols and Ethers by Nucleophilic Substitution at Quaternary Carbon Stereocenters

Angewandte Chemie International Edition, Volume 62, Issue 3, January 16, 2023., 2023
A highly efficient stereoinvertive nucleophilic substitution at the quaternary carbon stereocenter of cyclopropyl carbinol derivatives using water, alcohols and phenols as nucleophiles is reported. A variety of highly sterically hindered tertiary alkyl ethers and alcohols with adjacent tertiary carbon stereocenters are obtained in good yields with ...
Xu Chen, Kaushalendra Patel, Ilan Marek
wiley   +1 more source

Bifunctional organocatalysts for the asymmetric synthesis of axially chiral benzamides

Beilstein Journal of Organic Chemistry, 2017
Bifunctional organocatalysts bearing amino and urea functional groups in a chiral molecular skeleton were applied to the enantioselective synthesis of axially chiral benzamides via aromatic electrophilic bromination.
Ryota Miyaji, Yuuki Wada, Akira Matsumoto, Keisuke Asano, Seijiro Matsubara   +4 more
doaj   +1 more source

Catalytic enantioselective synthesis of quaternary carbon stereocentres. [PDF]

, 2014
Quaternary carbon stereocentres-carbon atoms to which four distinct carbon substituents are attached-are common features of molecules found in nature. However, before recent advances in chemical catalysis, there were few methods of constructing single ...
Overman, Larry E, Quasdorf, Kyle W
core  

Enantioselective Synthesis of Chiral-at-Sulfur 1,2-Benzothiazines by Cpx RhIII -Catalyzed C-H Functionalization of Sulfoximines.

Angewandte Chemie, 2018
Sulfoximines with stereogenic sulfur atoms are attractive structural motifs in drug discovery. A direct catalytic enantioselective method for the synthesis of sulfur-chiral 1,2-benzothiazines from readily accessible diaryl sulfoximines is presented ...
Yang Sun, N. Cramer
semanticscholar   +1 more source

Enantioselective Total Synthesis of (−)‐Deoxoapodine [PDF]

Angewandte Chemie International Edition, 2017
AbstractThe first enantioselective total synthesis of (−)‐deoxoapodine is described. Our synthesis of this hexacyclic aspidosperma alkaloid includes an efficient molybdenum‐catalyzed enantioselective ring‐closing metathesis reaction for the desymmetrization of an advanced intermediate that introduces the C5‐quaternary stereocenter.
Taek Kang, Kolby L. White, Tyler J. Mann, Amir H. Hoveyda, Mohammad Movassaghi   +4 more
openaire   +4 more sources

Amplification of Chiral Raman Scattering: A Review of Resonance Raman Optical Activity and Surface Enhanced Raman Optical Activity

Advanced Materials Interfaces, EarlyView.
Raman Optical Activity (ROA) uniquely probes chiral and stereochemical properties of molecules, revealing critical insights into fields like biology and material science. This review explores ROA's historical development, principles, limitations, and advancements, including resonance and surface‐enhanced methods to amplify signals.
Guojie Li, Ying Wang, Haipeng Lu, Zhifeng Huang   +3 more
wiley   +1 more source

Rational Design of a Facially Coordinating P,N,N Ligand for Manganese‐Catalysed Enantioselective Hydrogenation of Cyclic Ketones

Angewandte Chemie International Edition, Volume 62, Issue 3, January 16, 2023., 2023
A Mn catalyst has been rationally redesigned to repel sp3hybridised substituents while attracting sp2 substituents, and hence enable enantioselective hydrogenation of cyclic ketones. DFT calculations enable a robust prediction of the level of enantiocontrol across a range of substrates.
Conor L. Oates, Alister S. Goodfellow, Michael Bühl, Matthew L. Clarke   +3 more
wiley   +1 more source