Results 21 to 30 of about 13,653 (246)

RECENTES APLICAÇÕES EM SÍNTESE ORGÂNICA DE CATÁLISE FOTO REDOX MEDIADA POR LUZ VISÍVEL

open access: yesQuímica Nova, 2015
In the past few years, photoredox catalysis has become a powerful tool in the field of organic synthesis. Using this efficient method, it is possible to excite organic compounds from visible light and attain alternative mechanistic pathways for the ...
Angelina M. de Almeida   +2 more
doaj   +1 more source

A dual catalytic strategy for carbon-phosphorus cross-coupling via gold and photoredox catalysis. [PDF]

open access: yes, 2014
A new method for the P-arylation of aryldiazonium salts with H-phosphonates via dual gold and photoredox catalysis is described. The reaction proceeds smoothly at room temperature in the absence of base and/or additives, and offers an efficient approach ...
He, Ying, TOSTE, F. Dean, Wu, Hongmiao
core   +1 more source

Radical Fluoroalkylation Reactions [PDF]

open access: yes, 2018
Recent protocols and reactions for catalytic radical perfluoroalkylations will be described. The production of perfluoroalkyl radicals (RF = CnF2n+1, n ≥ 2), which effect both addition and substitution reactions on organic substrates, can be realized ...
Barata Vallejo, Sebastian   +2 more
core   +1 more source

Temperature‐Dependent Photoredox Catalysis for CO2 Reduction Coupled with Selective Benzyl Alcohol Oxidation over ZnIn2S4/In2O3 Heterostructure

open access: yesAdvanced Energy & Sustainability Research, 2023
CO2 reduction (CO2RR) with selective benzyl alcohol (BA) oxidation in a single photoredox reaction can simultaneously utilize photogenerated electrons and holes to realize efficient production of fuels and value‐added chemicals.
Jian Lei   +6 more
doaj   +1 more source

Functionalized Polyamine Synthesis with Photoredox Catalysis

open access: yesChemistry – A European Journal, 2023
AbstractPolyamines, such as putrescine and spermidine, are pivotal in various biological processes across living organisms. Despite their significance, structurally modified polyamines offer a less‐explored avenue for discovering bioactive compounds. The limitation is attributed to the synthetic difficulty of accessing functionalized polyamines.
Yuta Makihara   +4 more
openaire   +2 more sources

Advances in asymmetric organocatalysis over the last 10 years

open access: yesNature Communications, 2020
Organocatalysis has become a major pillar of (asymmetric) catalysis. Here, the authors discuss recent trends in organocatalytic activation modes for challenging stereoselective transformations and the emerging integration with other fields, such as ...
Shao-Hua Xiang, Bin Tan
doaj   +1 more source

Photochemical Approaches to Complex Chemotypes: Applications in Natural Product Synthesis. [PDF]

open access: yes, 2016
The use of photochemical transformations is a powerful strategy that allows for the formation of a high degree of molecular complexity from relatively simple building blocks in a single step. A central feature of all light-promoted transformations is the
Kärkäs, Markus D.   +2 more
core   +2 more sources

Visible-light photoredox catalyzed synthesis of pyrroloisoquinolines via organocatalytic oxidation/[3 + 2] cycloaddition/oxidative aromatization reaction cascade with Rose Bengal [PDF]

open access: yes, 2014
Pyrrolo[2,1-a]isoquinoline alkaloids have been prepared via a visible light photoredox catalyzed oxidation/[3 + 2] cycloaddition/oxidative aromatization cascade using Rose Bengal as an organo-photocatalyst.
Lau, Jonathan   +2 more
core   +7 more sources

Visible-light-mediated copper photocatalysis for organic syntheses

open access: yesBeilstein Journal of Organic Chemistry, 2021
Photoredox catalysis has been applied to renewable energy and green chemistry for many years. Ruthenium and iridium, which can be used as photoredox catalysts, are expensive and scarce in nature.
Yajing Zhang   +4 more
doaj   +1 more source

Semiheterogeneous Dual Nickel/Photocatalytic (Thio)etherification Using Carbon Nitrides [PDF]

open access: yes, 2019
A carbon nitride material can be combined with homogeneous nickel catalysts for light-mediated cross-couplings of aryl bromides with alcohols under mild conditions.
Cavedon, Cristian   +3 more
core   +1 more source

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