Visible light-promoted umpolung coupling of aryl tri-/difluoroethanones with 2-alkenylpyridines

2018 ◽  
Vol 54 (78) ◽  
pp. 11017-11020 ◽  
Author(s):  
Xiao Xu ◽  
Qing-Qiang Min ◽  
Na Li ◽  
Feng Liu
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Metal Free ◽  
Tertiary Alcohols ◽  
Simple Protocol

A metal-free, mild, and simple protocol is developed for the synthesis of tertiary alcohols bearing tri-/difluoromethyl groups upon visible-light irradiation.

Linking Melem with Conjugated Schiff-Base Bond to Boost Photocatalytic Efficiency of Carbon Nitride for Overall Water Splitting

Nanoscale ◽  
2021 ◽  
Author(s):  
Hu Liu ◽  
Mengqi Shen ◽  
Peng Zhou ◽  
Zhi Guo ◽  
Xinyang Liu ◽  
...  
Keyword(s):  
Schiff Base ◽  
Visible Light ◽  
Water Splitting ◽  
Visible Light Irradiation ◽  
Carbon Nitride ◽  
Light Irradiation ◽  
Graphitic Carbon Nitride ◽  
Photocatalytic Efficiency ◽  
Metal Free ◽  
Overall Water Splitting

Developing an efficient single component photocatalyst for overall water splitting under visible-light irradiation is extremely challenging. Herein, we report a metal-free graphitic carbon nitride (g-CxN4)-based nanosheet photocatalyst (x = 3.2,...

Noble-metal-free Ni3N/g-C3N4 photocatalysts with enhanced hydrogen production under visible light irradiation

2018 ◽  
Vol 47 (35) ◽  
pp. 12188-12196 ◽  
Author(s):  
Lu Chen ◽  
Huijuan Huang ◽  
Yuanhui Zheng ◽  
Wenhao Sun ◽  
Yi Zhao ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Visible Light ◽  
Hydrogen Evolution ◽  
Noble Metal ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Photocatalytic Hydrogen Evolution ◽  
Metal Free

Noble-metal-free Ni3N/g-C3N4 heterojunctions that show high photocatalytic hydrogen evolution activity comparable to platinized g-C3N4 were successfully synthesized.

Metal-Free Iodoperfluoroalkylation: Photocatalysis versus Frustrated Lewis Pair Catalysis

Synthesis ◽  
2020 ◽  
Vol 53 (01) ◽  
pp. 123-134
Author(s):  
Constantin Czekelius ◽  
Lucas Helmecke ◽  
Michael Spittler ◽  
Bernd M. Schmidt
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Reaction Pathways ◽  
Frustrated Lewis Pairs ◽  
Metal Free ◽  
Comprehensive Account ◽  
Frustrated Lewis Pair ◽  
Catalytic Metal ◽  
Lewis Pairs

A comparison of two catalytic, metal-free iodoperfluoro­alkylation protocols is presented. Frustrated Lewis pairs [ t Bu3P/B(C6F5)3] or phosphines/phosphites under visible light irradiation efficiently mediate the functionalization of non-activated alkenes and alkynes. A comprehensive account of the corresponding substrate scopes as well as insights into the mechanistic details of both reaction pathways are provided.

A metal-free route to alkynyl sulfones under photoinduced conditions with the insertion of sulfur dioxide

2020 ◽  
Vol 22 (6) ◽  
pp. 1906-1910 ◽  
Author(s):  
Xinxing Gong ◽  
Min Yang ◽  
Jin-Biao Liu ◽  
Fu-Sheng He ◽  
Xiaona Fan ◽  
...  
Keyword(s):  
Sulfur Dioxide ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Room Temperature ◽  
Light Irradiation ◽  
Metal Free

A metal-free route to alkynyl sulfones under photoinduced conditions is accomplished, starting from 4-alkyl Hantzsch esters, sulfur dioxide, and alkynyl bromides under visible light irradiation at room temperature.

A photo-auxiliary approach – enabling excited state classical phototransformations with metal free visible light irradiation

2017 ◽  
Vol 53 (10) ◽  
pp. 1692-1695 ◽  
Author(s):  
Akila Iyer ◽  
Steffen Jockusch ◽  
Jayaraman Sivaguru
Keyword(s):  
Excited State ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Uv Light ◽  
Light Irradiation ◽  
Metal Free ◽  
High Yields

To address the problem of using UV light to initiate traditional photoreactions, hydrazide based chromophores are evaluated as a “photo-auxiliary“ with visible light using a metal free photocatalyst to afford photoproducts in high yields.

Photocatalyst- and transition-metal-free α-allylation of N-aryl tetrahydroisoquinolines mediated by visible light

2020 ◽  
Vol 22 (3) ◽  
pp. 646-650 ◽  
Author(s):  
Zhuohua Li ◽  
Pengju Ma ◽  
Yongzhu Tan ◽  
Yufei Liu ◽  
Min Gao ◽  
...  
Keyword(s):  
Transition Metal ◽  
Transition Metals ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Metal Free

A convenient and efficient α-allylation of N-aryl tetrahydroisoquinolines has been achieved. This transformation can be realized under only visible light irradiation without the aid of transition metals or photocatalysts.

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