scholarly journals Easy Access to Allylic Sulfones Through Transition-Metal-Free Hydrosulfonylation Of Allenes

2021 ◽  
Author(s):  
Lucas Pagès ◽  
Sébastien Lemouzy ◽  
Marc Taillefer ◽  
Florian Monnier
Keyword(s):  
Transition Metal ◽  
Easy Access ◽  
Metal Free

An Easy Access to Sulfur Derivatives of 6,8-Dioxabicyclo[3.2.1]octanes, Naturally Abundant Scaffolds

Synthesis ◽  
2018 ◽  
Vol 50 (13) ◽  
pp. 2624-2630 ◽  
Author(s):  
Elena Schmidt ◽  
Ivan Bidusenko ◽  
Igor Ushakov ◽  
Nadezhda Protsuk ◽  
Boris Trofimov
Keyword(s):  
Natural Products ◽  
Free Radical ◽  
Transition Metal ◽  
Uv Irradiation ◽  
Radical Reaction ◽  
Easy Access ◽  
Free Radical Reaction ◽  
One Pot ◽  
Metal Free ◽  
Derivatives Of

Sulfur derivatives of 6,8-dioxabicyclo[3.2.1]octanes related to a number of natural products have been synthesized by the click hydrothiolation (AIBN or UV irradiation) of 7-methylene-6,8-dioxabicy­clo[3.2.1]octanes, assembled from acetylene and ketones in a one-pot transition-metal-free synthetic operation. An unusual feature of this free-radical reaction is that it is accelerated in the presence of bases due to involvement of the latter in a competition between the thiol addition and proton-catalyzed isomerization of the starting bicyclooctanes.

scholarly journals Easy Access To Allylic Sulfones Through Transition Metal-Free Hydrosulfonylation Of Allenes

2021 ◽  
Author(s):  
Lucas Pages ◽  
Sebastien Lemouzy ◽  
Marc Taillefer ◽  
Florian Monnier
Keyword(s):  
Transition Metal ◽  
Good Yield ◽  
Easy Access ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Metal Free ◽  
Brönsted Acid ◽  
One Step

A Brønsted acid-mediated addition of (hetero)aryl and (cyclo)alkyl sodium sulfinates to <i>N</i>-allenyl derivatives is described under very smooth conditions. This reaction provided a practical and efficient protocol for the synthesis of allylic sulfones in an atom- and step-economic fashion. In addition, an one-step double hydrosulfonylation has also been demonstrated, affording the corresponding 1,3-disulfone in to good yield.<br>

scholarly journals Easy Access To Allylic Sulfones Through Transition Metal-Free Hydrosulfonylation Of Allenes

2021 ◽  
Author(s):  
Lucas Pages ◽  
Sebastien Lemouzy ◽  
Marc Taillefer ◽  
Florian Monnier
Keyword(s):  
Transition Metal ◽  
Good Yield ◽  
Easy Access ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Metal Free ◽  
Brönsted Acid ◽  
One Step

A Brønsted acid-mediated addition of (hetero)aryl and (cyclo)alkyl sodium sulfinates to <i>N</i>-allenyl derivatives is described under very smooth conditions. This reaction provided a practical and efficient protocol for the synthesis of allylic sulfones in an atom- and step-economic fashion. In addition, an one-step double hydrosulfonylation has also been demonstrated, affording the corresponding 1,3-disulfone in to good yield.<br>

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.

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