Results 11 to 20 of about 2,722 (150)

Chiral 1H NMR of Atropisomeric Quinazolinones With Enantiopure Phosphoric Acids [PDF]

open access: yesFrontiers in Chemistry, 2018
A chiral phosphoric acid promoted enantioselective NMR analysis of atropisomeric quinazolinones was described, in which a variety of racemic arylquinazolinones such as afloqualone and IC-87114 were well recognized with up to 0. 21 ppm ΔΔδ value.
Chaofei Wu   +5 more
doaj   +3 more sources

Phosphoric acid-catalyzed atroposelective construction of axially chiral arylpyrroles [PDF]

open access: yesNature Communications, 2019
Axially chiral arylpyrroles are structural motifs often found in natural and medicinal products. Here, the authors report the atroposelective synthesis of axially chiral arylpyrrole derivatives, which proved to be efficient chiral ligands for asymmetric ...
Lei Zhang   +5 more
doaj   +3 more sources

Chiral phosphoric acid catalyzed aminative dearomatization of α-naphthols/Michael addition sequence [PDF]

open access: yesNature Communications, 2019
Catalytic asymmetric dearomatization (CADA) reactions readily convert common aromatic compounds to diverse 3D chiral, polycyclic molecules. Here, the authors report an intermolecular asymmetric dearomatization of nucleophile-tethered α-naphthols ...
Zi-Lei Xia   +3 more
doaj   +2 more sources

Chiral phosphoric acid and its applications of asymmetric catalytic hydrogenation [PDF]

open access: yesE3S Web of Conferences, 2021
As an excellent representative of organic small molecular catalysts, chiral phosphoric acid played an important role in asymmetric catalytic hydrogenation.
Zhuoxin Sun
doaj   +1 more source

Thermal Curing-Enhanced Circularly Polarized Phosphorescence [PDF]

open access: yesMolecules
Developing circularly polarized phosphorescence (CPP) materials integrating long-afterglow room-temperature phosphorescence (RTP) and chiral optical properties is highly attractive but challenging.
Shouchang Jiao   +3 more
doaj   +2 more sources

Chiral Phosphoric Acid Catalyzed Peroxidation of Imines [PDF]

open access: yesAngewandte Chemie International Edition, 2010
Peroxide-containing compounds are a class of biologically important targets, many of which possess antitumor, anti-bacterial, and antimalarial activities.[1] For example, the peroxide-containing natural product artemisinin (qinghaosu) has been shown to be a highly effective antimalarial drug.[2] The chiral peroxide moiety in this natural product was ...
Wenhua, Zheng   +2 more
openaire   +2 more sources

Recent applications of chiral phosphoric acids in palladium catalysis [PDF]

open access: yesOrganic & Biomolecular Chemistry, 2020
A variety of catalytic asymmetric reactions have been realized during the past decade through the combined action of palladium and chiral phosphoric acids (CPAs). This review surveys key examples and examines the underlying mechanisms of stereoinduction.
Van T. Tran   +3 more
openaire   +2 more sources

Organocatalytic cycloaddition of alkynylindoles with azonaphthalenes for atroposelective construction of indole-based biaryls

open access: yesNature Communications, 2022
There is great interest in methods for catalytic enantioselective construction of axially chiral compounds found in natural products. Here, the authors develop a cycloaddition strategy for atroposelective construction of indole-based biaryls via chiral ...
Hui Yang   +8 more
doaj   +1 more source

Stereoselective Synthesis of Axially Chiral Allenes and Styrenes via Chiral Phosphoric Acid Catalysis: An Overview [PDF]

open access: yesACS Omega
Alemayehu Gashaw Woldegiorgis   +5 more
doaj   +2 more sources

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