Facile and direct halogenation of 1,2,3-triazoles promoted by a KX–oxone system under transition metal free conditions

2021 ◽  
Author(s):  
Vishakha Rai ◽  
Ganesh Shivayogappa Sorabad ◽  
Mahagundappa Rachappa Maddani
Keyword(s):  
Transition Metal ◽  
Ambient Temperature ◽  
Metal Free ◽  
Oxidative Halogenation

A convenient and efficient oxidative halogenation of 4-aryl 1,2,3-triazoles is realized at ambient temperature under transition metal free conditions.

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.

scholarly journals Transition Metal-free Epoxidation of Alkenes Based on the Existence of (2- hydroxypropyl)-β-CD

2015 ◽  
Vol 9 (1) ◽  
pp. 20-24
Author(s):  
Shi Dongpo ◽  
Yin Xianqing ◽  
Zheng Yancheng ◽  
Chen wu ◽  
Fu Jiaxin ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Peroxide ◽  
Transition Metal ◽  
Sodium Bicarbonate ◽  
Ambient Temperature ◽  
Metal Free ◽  
High Yields ◽  
Epoxidation Of Alkenes

A green, efficient epoxidation of alkenes with hydrogen peroxide (HO) and sodium bicarbonate (NaHCO3) catalyzed by (2-hydroxypropyl)-β-cyclodextrin (2-hp-β-CD) in aqueous solution has been investigated in detail. A range of alkenes were epoxidized at ambient temperature with high yields.

Unorthodox cascade reaction of arynes and N-nitrosamides leading to indazole scaffolds

2022 ◽  
Author(s):  
Popuri Sureshbabu ◽  
Vinod Bhajammanavar ◽  
Venkatesan Subramanian ◽  
Venkata Surya Kumar Choutipalli ◽  
Mahiuddin Baidya
Keyword(s):  
Transition Metal ◽  
Ambient Temperature ◽  
Cascade Reaction ◽  
Bond Functionalization ◽  
Metal Free

An unusual cascade annulation of arynes with N-alkyl-N-nitrosamides is developed by leveraging aryne σ-insertion and C(sp3)–H bond functionalization strategies under transition-metal-free conditions at ambient temperature, offering functionalized indazoles in high...

Transition-metal-free oxidative C5 C–H-halogenation of 8-aminoquinoline amides using sodium halides

2016 ◽  
Vol 14 (43) ◽  
pp. 10180-10184 ◽  
Author(s):  
Ying Wang ◽  
Yang Wang ◽  
Kai Jiang ◽  
Qian Zhang ◽  
Dong Li
Keyword(s):  
Transition Metal ◽  
Low Cost ◽  
Metal Free ◽  
Sodium Halides ◽  
Oxidative Halogenation

A simple and efficient transition-metal-free oxidative halogenation (Cl, Br) of the C5 C–H bond of 8-aminoquinoline amides, with low-cost and innoxious sodium halides, has been developed.

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
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