ChemInform Abstract: NIS-Catalyzed Oxidative Cyclization of Alcohols with Amidines: A Simple and Efficient Transition-Metal Free Method for the Synthesis of 1,3,5-Triazines.

ChemInform ◽  
2016 ◽  
Vol 47 (14) ◽  
Author(s):  
Abhishek R. Tiwari ◽  
T. Akash ◽  
Bhalchandra M. Bhanage
Keyword(s):  
Transition Metal ◽  
Oxidative Cyclization ◽  
Metal Free

NIS-catalyzed oxidative cyclization of alcohols with amidines: a simple and efficient transition-metal free method for the synthesis of 1,3,5-triazines

2015 ◽  
Vol 13 (45) ◽  
pp. 10973-10976 ◽  
Author(s):  
Abhishek R. Tiwari ◽  
Akash T. ◽  
Bhalchandra M. Bhanage
Keyword(s):  
Transition Metal ◽  
Efficient Method ◽  
Oxidative Cyclization ◽  
Metal Free ◽  
Reaction Works

A simple and efficient method for the synthesis of 1,3,5-triazines by NIS-catalyzed oxidative cyclization of alcohols with amidines has been developed. The reaction works smoothly under transition-metal and phosphine-free conditions.

Transition-metal-free oxidative cyclization reaction of enynals to access pyrane-2-one derivatives

2021 ◽  
Author(s):  
Farzaneh Ansari ◽  
Hormoz Khosravi ◽  
Alireza Abbasi Kejani ◽  
Mahsa Armaghan ◽  
Walter Frank ◽  
...  
Keyword(s):  
Transition Metal ◽  
Oxidative Cyclization ◽  
Cyclization Reaction ◽  
Metal Free

K2S2O8 is introduced as an oxygen source and C–H functionalization agent in a novel selective metal-free oxidative cyclization of enynals to synthesize α-pyrone derivatives with a relatively broad substrate scope via the formation of two C–O bonds.

Visible light-induced tandem oxidative cyclization of 2-alkynylanilines with disulfides (diselenides) to 3-sulfenyl- and 3-selenylindoles under transition metal-free and photocatalyst-free conditions

2017 ◽  
Vol 4 (7) ◽  
pp. 1322-1330 ◽  
Author(s):  
Qing Shi ◽  
Pinhua Li ◽  
Yan Zhang ◽  
Lei Wang
Keyword(s):  
Transition Metal ◽  
Visible Light ◽  
Oxidative Cyclization ◽  
Efficient Synthesis ◽  
Metal Free

A simple and efficient synthesis of 3-sulfenyl (3-selenyl) indoles via visible light-induced cyclization of 2-alkynylanilines with disulfides(diselenides) was developed under transition metal-free and photocatalyst-free conditions.

Transition-metal-free oxidative cyclization of N-propargyl ynamides: stereospecific construction of linear polycyclic N-heterocycles

2018 ◽  
Vol 20 (14) ◽  
pp. 3271-3278 ◽  
Author(s):  
Cai-Ming Wang ◽  
Lin-Jun Qi ◽  
Qing Sun ◽  
Bo Zhou ◽  
Zhi-Xin Zhang ◽  
...  
Keyword(s):  
Transition Metal ◽  
Oxidative Cyclization ◽  
Diverse Range ◽  
Metal Free ◽  
Cascade Cyclization

An efficient NaBArF4-catalyzed oxidative cascade cyclization of N-propargyl ynamides has been developed, leading to a diverse range of polycyclic N-heterocycles with high diastereoselectivity and enantioselectivity.

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

Metal-free oxidative cyclization of trifluoroacetimidohydrazides with methylhetarenes: a facile access to 3-hetaryl-5-trifluoromethyl-1,2,4-triazoles

2021 ◽  
Author(s):  
Xiao-Feng Wu ◽  
Zhengkai Chen ◽  
Jiajun Zhang ◽  
Tian-Hui Xu
Keyword(s):  
Oxidative Cyclization ◽  
Efficient Synthesis ◽  
Metal Free

A metal-free oxidative cyclization of trifluoroacetimidohydrazides with methylhetarenes for the efficient synthesis of 3-hetaryl-5-trifluoromethyl-1,2,4-triazoles has been developed. Notable features of this protocol include readily accessible starting materials, a broad substrate...

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