Catalyst-Free Visible-Light-Induced Decarboxylative Amination of Glycine Derivatives with Azo Compounds

2021 ◽  
Author(s):  
Cen Zhou ◽  
Xiaozhou Huang ◽  
Ya-Qing Hu ◽  
Jun-Yan Wu ◽  
Ying Zheng ◽  
...  
Keyword(s):  
Amino Acids ◽  
Transition Metals ◽  
Visible Light ◽  
Organic Dyes ◽  
Azo Compounds ◽  
Catalyst Free ◽  
Glycine Derivatives

α‑Amino acids such as glycine derivatives have been commonly utilized as reagents for decarboxylative functionalization. In contrast to previous reports that require transition-metals and organic dyes to promote this process,...

scholarly journals Applications of organocatalysed visible-light photoredox reactions for medicinal chemistry

2018 ◽  
Vol 14 ◽  
pp. 2035-2064 ◽  
Author(s):  
Michael K Bogdos ◽  
Emmanuel Pinard ◽  
John A Murphy
Keyword(s):  
Pharmaceutical Industry ◽  
Transition Metals ◽  
Visible Light ◽  
Reaction Mechanisms ◽  
General Class ◽  
Medicinal Chemistry ◽  
Organic Dyes ◽  
General Reaction ◽  
High Degree ◽  
Synthetic Medicinal

The focus of this review is to provide an overview of the field of organocatalysed photoredox chemistry relevant to synthetic medicinal chemistry. Photoredox transformations have been shown to enable key transformations that are important to the pharmaceutical industry. This type of chemistry has also demonstrated a high degree of sustainability, especially when organic dyes can be employed in place of often toxic and environmentally damaging transition metals. The sections are arranged according to the general class of the presented reactions and the value of these methods to medicinal chemistry is considered. An overview of the general characteristics of the photocatalysts as well as some electrochemical data is presented. In addition, the general reaction mechanisms for organocatalysed photoredox transformations are discussed and some individual mechanistic considerations are highlighted in the text when appropriate.

Photocatalyst- and additive-free site-specific C(sp3)-H hydrazination of glycine derivatives and peptides

2021 ◽  
Author(s):  
Guang-Zu Wang ◽  
De-Guang Liu ◽  
Meng-Ting Liu ◽  
Yao Fu
Keyword(s):  
Visible Light ◽  
Coupling Reaction ◽  
Azo Compounds ◽  
Site Specific ◽  
Glycine Derivatives

A visible-light-mediated protocol for site-specific C(sp3)-H hydrazination of glycine derivatives and peptides with azo compounds has been developed. This C(sp3)-N coupling reaction proceeded smoothly under photo-irradiation conditions in the absence...

Cadmium sulfide quantum dots stabilized by aromatic amino acids for visible light-induced photocatalytic degradation of organic dyes

2015 ◽  
Vol 39 (9) ◽  
pp. 6951-6957 ◽  
Author(s):  
Jie Zhang ◽  
Yuming Guo ◽  
Hui Fang ◽  
Weili Jia ◽  
Han Li ◽  
...  
Keyword(s):  
Amino Acids ◽  
Quantum Dots ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Cadmium Sulfide ◽  
Hydroxyl Radicals ◽  
Visible Light Irradiation ◽  
Organic Dyes ◽  
Aromatic Amino Acids ◽  
Cds Qds

CdS QDs stabilized by aromatic amino acids photocatalytically degrade organic dyes under visible light irradiation through mediation of hydroxyl radicals.

Rhodamines as Photocatalyst in Organic Synthesis

2020 ◽  
Vol 07 ◽  
Author(s):  
Avik K. Bagdi ◽  
Papiya Sikdar
Keyword(s):  
Visible Light ◽  
Organic Synthesis ◽  
Organic Dyes ◽  
Transition Metal Catalysts ◽  
Visible Light Photocatalysis ◽  
Eosin Y ◽  
Organic Transformations ◽  
The Sustainable Development ◽  
Mechanistic Pathway ◽  
Green Model

Abstract:: Organic synthesis under environment friendly conditions has great impact in the sustainable development. In this context, visible light photocatalysis has emerged as a green model as this offers an energy-efficient pathway towards the organic transformation. Different transition-metal catalysts (Ir-, Ru-, Cu- etc) and organic dyes (eosin Y, rose bengal, methylene blue etc) are well-known photocatalysts in organic synthesis. Apart from the well-known organophotoredox catalysts, rhodamines (Rhodamine B and Rhodamine 6G) have been also employed as efficient photocatalysts for different organic transformations. In this review, we will focus on the photocatalysis by rhodamines in organic synthesis. Mechanistic pathway of the methodologies will also be discussed. We believe this review will stimulate the employment of rhodamines in the visible light photocatalysis for efficient organic transformations in the future.

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,...

Catalyst-Free [2,3]-Sigmatropic Rearrangement Reactions of Photochemically Generated Ammonium Ylides

Synthesis ◽  
2019 ◽  
Vol 51 (23) ◽  
pp. 4348-4358 ◽  
Author(s):  
Fang Li ◽  
Feifei He ◽  
Rene M. Koenigs
Keyword(s):  
Visible Light ◽  
Sigmatropic Rearrangement ◽  
Tertiary Amines ◽  
Amino Esters ◽  
Catalyst Free ◽  
Rearrangement Reaction ◽  
Rearrangement Reactions ◽  
Free Ammonium

The rearrangement reaction of ammonium ylides furnishes valuable α,α-disubstituted amino esters. In this work, we describe the visible-light photolysis reaction of aryldiazoacetates in the presence of tertiary amines that react via a free ammonium ylide in a sigmatropic rearrangement reaction to provide amino esters in moderate to very good yields (33 examples, up to 97% yield).

Photodegradation of organic dyes by PAN/SiO2-TiO2-NH2 nanofiber membrane under visible light

2019 ◽  
Vol 224 ◽  
pp. 509-514 ◽  
Author(s):  
Alaa Khalil ◽  
Nada M. Aboamera ◽  
Walaa S. Nasser ◽  
Walaa H. Mahmoud ◽  
Gehad G. Mohamed
Keyword(s):  
Visible Light ◽  
Organic Dyes ◽  
Nanofiber Membrane

Visible-Light-Induced C–H Bond Aminoalkylation of Heterocycles by the Decarboxylation Coupling of Amino Acids

2021 ◽  
Author(s):  
Yifan Li ◽  
Changhui Dai ◽  
Shentong Xie ◽  
Ping Liu ◽  
Peipei Sun
Keyword(s):  
Amino Acids ◽  
Visible Light
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