Visible-light-photoredox catalytic CC, CN bond formation: Synthesis of pyrazole derivatives via radical ions
Sign Up to like & getrecommendations! Published in 2017 at "Catalysis Communications"
DOI: 10.1016/j.catcom.2017.06.051
Abstract: Abstract A new approach for 5-amino-pyrazole-4-carbonitriles has been developed employing visible light photoredox catalysis. The green attributes of our work exploit on the utilization of visible light and Eosin Y organo photocatalyst as inexpensive, non-toxic,… read more here.
Keywords: light photoredox; visible light; formation; catalytic bond ... See more keywords
Visible-light photoredox catalyzed cyclization of aryl alkynoates for the synthesis of trifluoromethylated coumarins
Sign Up to like & getrecommendations! Published in 2018 at "Catalysis Communications"
DOI: 10.1016/j.catcom.2018.06.009
Abstract: Abstract A strategy for the synthesis of coumarin derivatives via visible-light photoredox catalysis has been developed using fac-Ir(ppy)3 as the photocatalyst under mild conditions. Trifluoromethanesulfonyl chloride is utilized as the trifluoromethylation reagent, which is cheap… read more here.
Keywords: cyclization; light photoredox; visible light; photoredox catalyzed ... See more keywords
Regioselective oxidative ring-opening of cyclopropenyl carboxylates by visible light photoredox catalysis
Sign Up to like & getrecommendations! Published in 2018 at "Tetrahedron Letters"
DOI: 10.1016/j.tetlet.2018.05.047
Abstract: Abstract Catalyzed by Ir(dFCF 3 ppy) 2 (dtbbpy)PF 6 , several aroyl methylidenemalonates were synthesized in good to excellent yields via visible light photoredox-catalyzed the oxidative ring-opening of cyclopropenyl carboxylate derivatives. The possible mechanism of… read more here.
Keywords: ring opening; oxidative ring; opening cyclopropenyl; light photoredox ... See more keywords
Alcohol Etherification via Alkoxy Radicals Generated by Visible-Light Photoredox Catalysis
Sign Up to like & getrecommendations! Published in 2020 at "Organic Letters"
DOI: 10.1021/acs.orglett.0c03058
Abstract: A mechanistically divergent method is described that, employing a commercially available hypervalent iodine(III) reagent, generates alkoxy radicals from 1°, 2°, and 3° alcohols and allows their use in the functionalization of C(sp3)–H and C(sp2)–H bonds.… read more here.
Keywords: alkoxy radicals; photoredox catalysis; light photoredox; visible light ... See more keywords
Synthesis of 4-Isoxazolines via Visible-Light Photoredox-Catalyzed [3 + 2] Cycloaddition of Oxaziridines with Alkynes.
Sign Up to like & getrecommendations! Published in 2017 at "Organic letters"
DOI: 10.1021/acs.orglett.7b03369
Abstract: A method for [3 + 2] cycloaddition of oxaziridines with alkynes to form 4-isoxazolines via visible-light photoredox catalysis is described. This method is a greener, atom-economical reaction that tolerates various functional groups and provides good… read more here.
Keywords: cycloaddition oxaziridines; oxaziridines alkynes; visible light; light photoredox ... See more keywords
Visible-Light Photoredox/Nickel Dual Catalysis for the Cross-Coupling of Sulfinic Acid Salts with Aryl Iodides.
Sign Up to like & getrecommendations! Published in 2018 at "Organic letters"
DOI: 10.1021/acs.orglett.7b03896
Abstract: An efficient cross-coupling of sodium or lithium sulfinates with aryl iodides, using a combination of nickel and photoredox catalysis, is described. The dual catalyst system enables a versatile synthesis of aryl sulfones at room temperature… read more here.
Keywords: light photoredox; aryl iodides; catalysis; visible light ... See more keywords
Visible-Light Photoredox-Catalyzed Iminyl Radical Formation by N-H Cleavage with Hydrogen Release and Its Application in Synthesis of Isoquinolines.
Sign Up to like & getrecommendations! Published in 2018 at "Organic letters"
DOI: 10.1021/acs.orglett.8b00193
Abstract: An unprecedented visible-light photoredox-catalyzed iminyl radical formation by N-H cleavage with H2 release has been developed. Its application in the synthesis of various isoquinolines and related polyaromatics in high atom economy at ambient temperature by… read more here.
Keywords: iminyl radical; light photoredox; visible light; catalyzed iminyl ... See more keywords
Visible-Light Photoredox-Catalyzed Hydroalkoxymethylation of Activated Alkenes Using α-Silyl Ethers as Alkoxymethyl Radical Equivalents.
Sign Up to like & getrecommendations! Published in 2018 at "Organic letters"
DOI: 10.1021/acs.orglett.8b02721
Abstract: A new neutral silicon-based traceless activation group (TAG) for visible-light photoredox-catalyzed hydroalkoxymethylation of alkenes is presented. This reaction involves in-situ-generated alkoxymethyl radical via single electron oxidation (SET) of α-TMS-substituted ethers, followed by subsequent conjugate addition… read more here.
Keywords: alkoxymethyl radical; light photoredox; visible light; activated alkenes ... See more keywords
Photocatalyst-Free Visible-Light Photoredox Dearomatization of Phenol Derivatives Containing Ketoximes: An Easy Access to Spiropyrrolines.
Sign Up to like & getrecommendations! Published in 2019 at "Organic letters"
DOI: 10.1021/acs.orglett.9b00372
Abstract: A novel and simple visible-light photoredox intramolecular dearomatization of phenol derivatives containing ketoximes leading to spiropyrrolines has been developed. The protocol uses readily available 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) as the base and electron-donor, visible light as the… read more here.
Keywords: phenol derivatives; dearomatization phenol; light photoredox; visible light ... See more keywords
Direct Transformation of Nitroalkanes to Nitriles Enabled by Visible-Light Photoredox Catalysis and a Domino Reaction Process.
Sign Up to like & getrecommendations! Published in 2019 at "Organic letters"
DOI: 10.1021/acs.orglett.9b02682
Abstract: A mild and convenient process for direct transformation of nitroalkanes to the corresponding nitriles was developed using a visible-light photoredox catalysis strategy with household decorative blue LEDs and the additives of Et3N and DIPIBA (or… read more here.
Keywords: direct transformation; transformation nitroalkanes; light photoredox; visible light ... See more keywords
Nonadiabatic Curve-Crossing Model for the Visible-Light Photoredox Catalytic Generation of Radical Intermediate via a Concerted Mechanism
Sign Up to like & getrecommendations! Published in 2018 at "ACS Catalysis"
DOI: 10.1021/acscatal.8b00601
Abstract: Photoredox catalysis relies on the excited-state single-electron transfer (SET) processes to drive a series of unique bond-forming reactions. In this work accurate electronic structure calculations at the CASPT2//CASSCF/PCM level of theory together with the kinetic… read more here.
Keywords: light photoredox; visible light; crossing model; photoredox ... See more keywords