scholarly journals Oxidative Hydroxylation of Aryl Boronic Acid Catalyzed by Co-porphyrin Complexes via Blue-Light Irradiation

Catalysts ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1262
Author(s):  
Alaa A. Atia ◽  
Masanari Kimura
Keyword(s):  
Blue Light ◽  
Biodegradable Polymers ◽  
Boronic Acid ◽  
Oxidation Process ◽  
Boronic Acids ◽  
Light Irradiation ◽  
Phenol Derivatives ◽  
Oxidative Reactions ◽  
Acid Catalyzed ◽  
Aryl Boronic Acid

Oxidative reactions often require unstable and environmentally harmful oxidants; therefore, the investigation of safer alternatives is urgent. Here, the hydroxylation of aryl boronic acid in the presence of Co-complexes is demonstrated. Tetrakis(4-carboxyphenyl) Co(II)-porphyrin was combined with biodegradable polymers such as chitosan catalyzed hydroxylation of phenyl boronic acids to form phenol derivatives under blue-light irradiation. This catalytic system can be used as an eco-friendly oxidation process that does not release oxidizing agents into the atmosphere.

Room Temperature Coupling of Aryldiazoacetates with Boronic Acids Enhanced by Blue Light Irradiation

2020 ◽  
Vol 26 (25) ◽  
pp. 5648-5653 ◽  
Author(s):  
Amanda F. Silva ◽  
Marco A. S. Afonso ◽  
Rodrigo A. Cormanich ◽  
Igor D. Jurberg
Keyword(s):  
Blue Light ◽  
Room Temperature ◽  
Boronic Acids ◽  
Light Irradiation

scholarly journals Cover Feature: Room Temperature Coupling of Aryldiazoacetates with Boronic Acids Enhanced by Blue Light Irradiation (Chem. Eur. J. 25/2020)

2020 ◽  
Vol 26 (25) ◽  
pp. 5555-5555
Author(s):  
Amanda F. Silva ◽  
Marco A. S. Afonso ◽  
Rodrigo A. Cormanich ◽  
Igor D. Jurberg
Keyword(s):  
Blue Light ◽  
Room Temperature ◽  
Boronic Acids ◽  
Light Irradiation

Rh(III)-Catalyzed Three-Component Syn-Carboamination of Alkenes Using Arylboronic Acids and Dioxazolones

2021 ◽  
Author(s):  
Sumin Lee ◽  
Tomislav Rovis
Keyword(s):  
Amino Acid ◽  
Boronic Acid ◽  
Boronic Acids ◽  
Reductive Elimination ◽  
Amino Acid Derivatives ◽  
Arylboronic Acids ◽  
Migratory Insertion ◽  
Series Of Experiments ◽  
By Products ◽  
Aryl Boronic Acid

<p>Herein we report a Rh(III)-catalyzed three-component carboamination of alkenes from readily available aryl boronic acids as a carbon source and dioxazolones as nitrogen electrophiles. This protocol provides facile access to valuable amine products including <i>a</i>-amino acid derivatives in good yield and excellent regioselectivity without the need for a directing functionality. A series of experiments suggest a mechanism in which the Rh(III) catalyst undergoes transmetalation with the aryl boronic acid followed by turnover limiting, alkene migratory insertion into the Rh(III)-aryl bond. Subsequently, fast Rh-nitrene formation provides the <i>syn</i>-carboamination product selectively after reductive elimination and proto-demetalation. Importantly, the protocol provides 3-component coupling products in preference to a variety of 2-component undesired by-products.</p>

scholarly journals Rh(III)-Catalyzed Three-Component Syn-Carboamination of Alkenes Using Arylboronic Acids and Dioxazolones

2021 ◽  
Author(s):  
Sumin Lee ◽  
Tomislav Rovis
Keyword(s):  
Amino Acid ◽  
Boronic Acid ◽  
Boronic Acids ◽  
Reductive Elimination ◽  
Amino Acid Derivatives ◽  
Arylboronic Acids ◽  
Migratory Insertion ◽  
Series Of Experiments ◽  
By Products ◽  
Aryl Boronic Acid

<p>Herein we report a Rh(III)-catalyzed three-component carboamination of alkenes from readily available aryl boronic acids as a carbon source and dioxazolones as nitrogen electrophiles. This protocol provides facile access to valuable amine products including <i>a</i>-amino acid derivatives in good yield and excellent regioselectivity without the need for a directing functionality. A series of experiments suggest a mechanism in which the Rh(III) catalyst undergoes transmetalation with the aryl boronic acid followed by turnover limiting, alkene migratory insertion into the Rh(III)-aryl bond. Subsequently, fast Rh-nitrene formation provides the <i>syn</i>-carboamination product selectively after reductive elimination and proto-demetalation. Importantly, the protocol provides 3-component coupling products in preference to a variety of 2-component undesired by-products.</p>

Evaluation of Photobiogoverning Role of Blue Light Irradiation on Viral Replication

2021 ◽  
Author(s):  
Phil‐Sun Oh ◽  
Kyung Won Kang ◽  
Seung Rok Ryu ◽  
SeokTae Lim ◽  
Myung‐Hee Sohn ◽  
...  
Keyword(s):  
Viral Replication ◽  
Blue Light ◽  
Light Irradiation

scholarly journals Effects of blue-light irradiation during dental treatment

2018 ◽  
Vol 54 (4) ◽  
pp. 160-168 ◽  
Author(s):  
Fumihiko Yoshino ◽  
Ayaka Yoshida
Keyword(s):  
Blue Light ◽  
Dental Treatment ◽  
Light Irradiation
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