scholarly journals Visible-Light-Induced Oxidative Cleavage of C-C Triple Bond via Hydroamination: Direct Synthesis of Oxamates from Amines and Activated Alkynes

2019 ◽  
Author(s):  
Sharada Duddu. S ◽  
Sagar Arepally ◽  
Arumugavel Murugan ◽  
Narenderreddy Katta ◽  
Mamata Ojha
Keyword(s):  
Visible Light ◽  
Triple Bond ◽  
Room Temperature ◽  
Direct Synthesis ◽  
Oxidative Cleavage ◽  
Organic Dye ◽  
Reaction Conditions ◽  
Radical Coupling ◽  
Activated Alkynes ◽  
Key Features

<p>The direct oxidative cleavage of activated alkynes <i>via</i> hydroamination has been described using organic photocatalyst under visible-light irradiation at room temperature. In this reaction, the single electron oxidation of an insitu formed enamines undergo radical coupling with oxidant which finally delivers the oxamates. The key features of this photocatalytic reaction are the mild reaction conditions, metal-free organic dye as photocatalyst, TBHP plays dual role as “O” source and for the regeneration of photocatalyst. <br></p>

scholarly journals Visible-Light-Induced Oxidative Cleavage of C-C Triple Bond via Hydroamination: Direct Synthesis of Oxamates from Amines and Activated Alkynes

2019 ◽  
Author(s):  
Sharada Duddu. S ◽  
Sagar Arepally ◽  
Arumugavel Murugan ◽  
Narenderreddy Katta ◽  
Mamata Ojha
Keyword(s):  
Visible Light ◽  
Triple Bond ◽  
Room Temperature ◽  
Direct Synthesis ◽  
Oxidative Cleavage ◽  
Organic Dye ◽  
Reaction Conditions ◽  
Radical Coupling ◽  
Activated Alkynes ◽  
Key Features

<p>The direct oxidative cleavage of activated alkynes <i>via</i> hydroamination has been described using organic photocatalyst under visible-light irradiation at room temperature. In this reaction, the single electron oxidation of an insitu formed enamines undergo radical coupling with oxidant which finally delivers the oxamates. The key features of this photocatalytic reaction are the mild reaction conditions, metal-free organic dye as photocatalyst, TBHP plays dual role as “O” source and for the regeneration of photocatalyst. <br></p>

scholarly journals Visible-Light-Induced Oxidative Cleavage of C-C Triple Bond via Hydroamination: Direct Synthesis of Oxamates from Amines and Activated Alkynes

2018 ◽  
Author(s):  
Sharada Duddu. S ◽  
Sagar Arepally ◽  
Arumugavel Murugan ◽  
Mamata Ojha
Keyword(s):  
Visible Light ◽  
Triple Bond ◽  
Room Temperature ◽  
Direct Synthesis ◽  
Oxidative Cleavage ◽  
Organic Dye ◽  
Reaction Conditions ◽  
Radical Coupling ◽  
Activated Alkynes ◽  
Key Features

<p>The direct oxidative cleavage of activated alkynes <i>via</i> hydroamination has been described using organic photocatalyst under visible-light irradiation at room temperature. In this reaction, the single electron oxidation of an insitu formed enamines undergo radical coupling with oxidant which finally delivers the oxamates. The key features of this photocatalytic reaction are the mild reaction conditions, metal-free organic dye as photocatalyst, TBHP plays dual role as “O” source and for the regeneration of photocatalyst. <br></p>

scholarly journals Rose Bengal-Catalyzed Photoredox C-C Triple Bond Oxidative Cleavage via Hydroamination; Direct Synthesis of Oxamates from Amines and Activated Alkynes

2018 ◽  
Author(s):  
Sharada Duddu. S ◽  
Sagar Arepally ◽  
Arumugavel Murugan ◽  
Mamata Ojha
Keyword(s):  
Rose Bengal ◽  
Triple Bond ◽  
Room Temperature ◽  
Bond Cleavage ◽  
Direct Synthesis ◽  
Organic Dye ◽  
Metal Free ◽  
Mild Conditions ◽  
Activated Alkynes ◽  
Key Features

<p>An organic dye photoredox-catalyzed oxidative C-C triple bond cleavage <i>via</i> hydroamination leading to oxamates at room temperature has been described. The key features of this transformation are the mild conditions, metal-free organic dye as photocatalyst, broad amines scope, and a tandem hydroamination-oxidative C-C triple bond cleavage. </p>

scholarly journals Visible light-mediated photocatalytic oxidative cleavage of activated alkynes via hydroamination: a direct approach to oxamates

RSC Advances ◽  
2020 ◽  
Vol 10 (21) ◽  
pp. 12599-12603 ◽  
Author(s):  
Narenderreddy Katta ◽  
Mamata Ojha ◽  
Arumugavel Murugan ◽  
Sagar Arepally ◽  
Duddu S. Sharada
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Room Temperature ◽  
Oxidative Cleavage ◽  
Direct Approach ◽  
Light Irradiation ◽  
Activated Alkynes

The direct oxidative cleavage of activated alkynes via hydroamination has been described using organic photocatalyst under visible-light irradiation at room temperature.

Visible-light-initiated Catalyst-free Oxidative Cleavage of Triaryl-Substituted Alkenes C=C Bonds under Ambient Conditions

2021 ◽  
Author(s):  
Wenjing Li ◽  
Shun Li ◽  
Lihua Luo ◽  
Yichen Ge ◽  
Jiaqi Xu ◽  
...  
Keyword(s):  
Visible Light ◽  
Room Temperature ◽  
Ambient Air ◽  
Oxidative Cleavage ◽  
Ambient Conditions ◽  
Blue Led ◽  
Catalyst Free

The catalyst-free oxidative cleavage of (Z)-triaryl-substituted alkenes bearing pyridyl motif with ambient air under irradiation of blue LED at room temperature has been developed. The reaction was facile and scalable,...

Visible-Light Photoredox-Catalyzed Cascade Reaction for the Synthesis of Pyrrolo[2,1-a]isoquinoline-Substituted Phosphonates

Synthesis ◽  
2018 ◽  
Vol 51 (02) ◽  
pp. 522-529 ◽  
Author(s):  
Deqing Shi ◽  
Lingna Wang ◽  
Tiancong Ma ◽  
Mingming Qiao ◽  
Qiangxian Wu ◽  
...  
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Room Temperature ◽  
Cascade Reaction ◽  
Efficient Synthesis ◽  
Reaction Conditions ◽  
One Pot ◽  
Oxidative Aromatization ◽  
Activated Olefins ◽  
Catalyzed Oxidation

A visible-light photoredox-catalyzed oxidation/[3+2] cycloaddition/oxidative aromatization cascade reaction of [(3,4-dihydroisoquinolin-2(1H)-yl)methyl]phosphonates and activated olefins or alkynes for the efficient synthesis of potentially biological active pyrrolo[2,1-a]isoquinoline-substituted phosphonates was developed. This transformation features mild reaction conditions (i.e., visible light irradiation, room temperature), molecular oxygen (O2) as a green oxidant, simple ‘one-pot’ operation.

Transition metal-free, visible-light-mediated construction of α,β-diamino esters via decarboxylative radical addition at room temperature

2019 ◽  
Vol 6 (13) ◽  
pp. 2245-2249 ◽  
Author(s):  
Guibing Wu ◽  
Jingwen Wang ◽  
Chengyu Liu ◽  
Maolin Sun ◽  
Lei Zhang ◽  
...  
Keyword(s):  
Transition Metal ◽  
Visible Light ◽  
Carboxylic Acids ◽  
Room Temperature ◽  
Radical Addition ◽  
Metal Free ◽  
Radical Coupling

A metal-free photoredox catalyzed decarboxylative radical coupling of free-carboxylic acids and glyoxylic oximes was developed to synthesize α,β-diamino acids.

Facile and direct synthesis of symmetrical acid anhydrides using a newly prepared powerful and efficient mixed reagent

2015 ◽  
Vol 69 (3) ◽  
Author(s):  
Hamed Rouhi-Saadabad ◽  
Batool Akhlaghinia
Keyword(s):  
Carboxylic Acids ◽  
Room Temperature ◽  
Low Cost ◽  
Direct Synthesis ◽  
Reaction Conditions ◽  
Experimental Procedure ◽  
Short Reaction Time ◽  
Acid Anhydrides ◽  
Work Up ◽  
Trichloroisocyanuric Acid

AbstractAn efficient mixed reagent for direct synthesis of symmetrical carboxylic anhydrides from carboxylic acids has been prepared. Carboxylic acids are converted to anhydrides using triphenylphosphine/ trichloroisocyanuric acid under mild reaction conditions at room temperature. Short reaction time, excellent yields of products, low cost, availability of reagents, simple experimental procedure, and easy work-up of the products are the main advantages of the presented method.

Visible-light-induced selectivity controllable synthesis of diamine or imidazoline derivatives by multicomponent decarboxylative radical coupling reactions

2020 ◽  
Vol 7 (24) ◽  
pp. 4043-4049
Author(s):  
Shulei Pan ◽  
Min Jiang ◽  
Guofu Zhong ◽  
Linlong Dai ◽  
Yu Zhou ◽  
...  
Keyword(s):  
Visible Light ◽  
Coupling Reactions ◽  
Controllable Synthesis ◽  
Reaction Conditions ◽  
Radical Coupling ◽  
Imidazoline Derivatives ◽  
Vicinal Diamines

A visible-light-induced and photoredox-catalyzed three-component selectivity controllable synthesis of vicinal diamines and imidazoles from readily available starting materials under mild reaction conditions has been realized.

Synthesis of 1,2-amino alcohols by decarboxylative coupling of amino acid derived α-amino radicals to carbonyl compounds via visible-light photocatalyst in water

2020 ◽  
Vol 22 (2) ◽  
pp. 336-341 ◽  
Author(s):  
Shulei Pan ◽  
Min Jiang ◽  
Jinjin Hu ◽  
Ruigang Xu ◽  
Xiaofei Zeng ◽  
...  
Keyword(s):  
Amino Acids ◽  
Visible Light ◽  
Carbonyl Compounds ◽  
Room Temperature ◽  
Coupling Reaction ◽  
Amino Alcohols ◽  
Visible Light Photocatalyst ◽  
Radical Coupling ◽  
Decarboxylative Coupling ◽  
Radical Coupling Reaction

A general and efficient visible-light photoredox-catalyzed decarboxylative radical coupling reaction of N-aryl amino acids with aldehydes or ketones for the synthesis of 1,2-amino alcohols in water at room temperature is described.

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