Insertion of Isolated Alkynes into Carbon-Carbon σ-Bonds of Unstrained Cyclic β-Ketoesters via Transition-Metal-Free Tandem Reactions: Synthesis of Medium-Sized Ring Compounds

2016 ◽  
Vol 22 (50) ◽  
pp. 17936-17939 ◽  
Author(s):  
Yuanyuan Zhou ◽  
Xianghua Tao ◽  
Qiyi Yao ◽  
Yulei Zhao ◽  
Yanzhong Li
Keyword(s):  
Transition Metal ◽  
Tandem Reactions ◽  
Metal Free ◽  
Ring Compounds

Construction of 6H-benzo[c]thiochromenes via a tandem reaction of arynes with thionoesters

2021 ◽  
Author(s):  
Yi An ◽  
Fang Zhang ◽  
Guangfen Du ◽  
Zhihua Cai ◽  
Lin He
Keyword(s):  
Transition Metal ◽  
Tandem Reaction ◽  
Tandem Reactions ◽  
Metal Free

A mild and transition-metal free method has been proposed for the synthesis of 6H-benzo[c]thiochromenes via the tandem reactions of arynes with thionoesters.

New routes for the synthesis of fused pyrrole scaffolds through transition metal-free tandem reactions

2013 ◽  
Vol 54 (45) ◽  
pp. 5994-5997 ◽  
Author(s):  
Bingchuan Yang ◽  
Zixiao Huang ◽  
Hegen Guan ◽  
Xiaoyi Niu ◽  
Yanqiu Li ◽  
...  
Keyword(s):  
Transition Metal ◽  
Tandem Reactions ◽  
Metal Free

ChemInform Abstract: New Routes for the Synthesis of Fused Pyrrole Scaffolds Through Transition Metal-Free Tandem Reactions.

ChemInform ◽  
2014 ◽  
Vol 45 (10) ◽  
pp. no-no
Author(s):  
Bingchuan Yang ◽  
Zixiao Huang ◽  
Hegen Guan ◽  
Xiaoyi Niu ◽  
Yanqiu Li ◽  
...  
Keyword(s):  
Transition Metal ◽  
Tandem Reactions ◽  
Metal Free

Transition-Metal-Free Ring Expansion Reactions of Indene-1,3-dione: Synthesis of Functionalized Benzoannulated Seven-Membered Ring Compounds

2018 ◽  
Vol 20 (7) ◽  
pp. 1744-1747 ◽  
Author(s):  
Qiyi Yao ◽  
Lingkai Kong ◽  
Mengdan Wang ◽  
Yang Yuan ◽  
Ruizhuo Sun ◽  
...  
Keyword(s):  
Transition Metal ◽  
Ring Expansion ◽  
Membered Ring ◽  
Free Ring ◽  
Metal Free ◽  
Ring Compounds

Transition-metal-free catalytic hydroboration reduction of amides to amines

2020 ◽  
Vol 7 (21) ◽  
pp. 3515-3520
Author(s):  
Wubing Yao ◽  
Jiali Wang ◽  
Aiguo Zhong ◽  
Shiliang Wang ◽  
Yinlin Shao
Keyword(s):  
Transition Metal ◽  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Value Added ◽  
Metal Free

The selective catalytic reduction of amides to value-added amine products is a desirable but challenging transformation.

Deaminative carbonylative thioesterification of activated alkylamines with thiophenols under transition-metal-free conditions

2021 ◽  
Author(s):  
Fengqian Zhao ◽  
Xiao-Feng Wu
Keyword(s):  
Free Radical ◽  
Transition Metal ◽  
Metal Free

A transition-metal-free radical carbonylation of activated alkylamines with thiophenols has been successfully developed. Various thioesters were selectively produced with moderate to good yields.

Regioselective C3-H Trifluoromethylation of 2H-Indazole Under Transition-Metal-Free Photoredox Catalysis

2019 ◽  
Author(s):  
Arumugavel Murugan ◽  
Venkata Nagarjuna Babu ◽  
Nagaraj Sabarinathan ◽  
Sharada Duddu. S
Keyword(s):  
Transition Metal ◽  
Visible Light ◽  
Practical Approach ◽  
Hypervalent Iodine ◽  
Radical Mechanism ◽  
Photoredox Catalysis ◽  
Metal Free

Here we report a visible-light-promoted metal-free regioselective C3-H trifluoromehtylation reaction that proceeds via radical mechanism and which supported by control experiments. The combination of photoredox catalysis and hypervalent iodine reagent provides a practical approach for the present trifluoromethylation reaction and synthesis of a library of trifluoromethylated indazoles.

Selective Oxidation of Alcohols Catalyzed by a Transition Metal-Free System of NHPI/DDQ/NaNO2

2011 ◽  
Vol 32 (1) ◽  
pp. 118-122 ◽  
Author(s):  
Lipeng ZHOU ◽  
Chaofeng ZHANG ◽  
Tao FANG ◽  
Bingbing ZHANG ◽  
Ying WANG ◽  
...  
Keyword(s):  
Transition Metal ◽  
Selective Oxidation ◽  
Free System ◽  
Metal Free ◽  
Oxidation Of Alcohols

Defect engineering and characterization of active sites for efficient electrocatalysis

Nanoscale ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 3327-3345
Author(s):  
Xuecheng Yan ◽  
Linzhou Zhuang ◽  
Zhonghua Zhu ◽  
Xiangdong Yao
Keyword(s):  
Transition Metal ◽  
Active Sites ◽  
Defect Engineering ◽  
Metal Free

This review highlights recent advancements in defect engineering and characterization of both metal-free carbons and transition metal-based electrocatalysts.

Transition metal free, green and facile halogenation of ketene dithioacetals using a KX–oxidant system

2021 ◽  
Author(s):  
Vishakha Rai ◽  
Ganesh Shivayogappa Sorabad ◽  
Mahagundappa Rachappa Maddani
Keyword(s):  
Transition Metal ◽  
Ambient Temperature ◽  
Metal Free ◽  
Ketene Dithioacetals ◽  
System P ◽  
Oxidative Halogenation ◽  
Potassium Halide

A facile oxidative halogenation of α-oxo ketene dithioacetals is achieved by using a potassium halide and an oxidant combination under transition metal free conditions at ambient temperature.

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