Assembly of Furazan-Fused Quinolines via an Expeditious Metal-Free [2+2+1] Radical Tandem Cyclization Process

2021 ◽  
Author(s):  
Guobo Deng ◽  
Ronglin Zhong ◽  
Jianxin Song ◽  
Pui Ying Choy ◽  
Fuk Yee Kwong
Keyword(s):  
Metal Free ◽  
Cyclization Process ◽  
Tandem Cyclization

Visible-light-induced tandem cyclization of 2-alkynylanilines with disulfides: a convenient method for accessing benzothiophenes under transition-metal-free and photocatalyst-free conditions

2017 ◽  
Vol 15 (36) ◽  
pp. 7678-7684 ◽  
Author(s):  
Xiaoyu Xie ◽  
Pinhua Li ◽  
Qing Shi ◽  
Lei Wang
Keyword(s):  
Transition Metal ◽  
Visible Light ◽  
Convenient Method ◽  
Metal Free ◽  
Efficient Route ◽  
Tandem Cyclization

An efficient route to benzothiophenes via visible-light induced cyclization of 2-alkynylanilines with disulfides under transition-metal-free and photocatalyst-free conditions was developed.

Polythene glycol (PEG) as a reusable solvent system for the synthesis of 1,3,5-triazines via aerobic oxidative tandem cyclization of benzylamines and N-substituted benzylamines with amidines under transition metal-free conditions

2016 ◽  
Vol 18 (1) ◽  
pp. 144-149 ◽  
Author(s):  
Abhishek R. Tiwari ◽  
Bhalchandra M. Bhanage
Keyword(s):  
Transition Metal ◽  
Solvent System ◽  
Metal Free ◽  
Highly Efficient ◽  
Tandem Cyclization ◽  
Peg 600

A highly efficient protocol for the synthesis of 1,3,5-triazines from benzylamines and amidines in PEG-600 has been developed.

Efficient synthesis of perfluoroalkylated quinolines via a metal-free cascade Michael addition/intramolecular rearrangement cyclization process

Tetrahedron ◽  
2020 ◽  
Vol 76 (43) ◽  
pp. 131518
Author(s):  
Jun Wu ◽  
Hui Zhang ◽  
Xiao Ding ◽  
Xuefei Tan ◽  
Hong C. Shen ◽  
...  
Keyword(s):  
Michael Addition ◽  
Intramolecular Rearrangement ◽  
Efficient Synthesis ◽  
Metal Free ◽  
Cyclization Process

Transition-metal free thiocyanooxygenation of functionalized alkenes: facile routes to SCN-containing dihydrofurans and lactones

2016 ◽  
Vol 14 (11) ◽  
pp. 3098-3104 ◽  
Author(s):  
Li-Na Guo ◽  
Yu-Rui Gu ◽  
Hua Yang ◽  
Jie Hu
Keyword(s):  
Transition Metal ◽  
Economical Method ◽  
Metal Free ◽  
Mild Conditions ◽  
Tandem Cyclization

An efficient transition-metal free tandem cyclization of functionalized alkenes with thiocyanate salts has been developed under mild conditions. This protocol offers a simple, easy-to-handle, and atom-economical method for the synthesis of SCN-containing dihydrofurans and lactones with good to excellent yields.

DDQ/TBHP-Induced Oxidative Cyclization Process: A Metal-Free Approach for the Synthesis of 2-Phenylquinazolines

Synthesis ◽  
2012 ◽  
Vol 44 (13) ◽  
pp. 2065-2069 ◽  
Author(s):  
Mandava Basaveswara Rao ◽  
Sridhar Rachakonda ◽  
P. Pratap
Keyword(s):  
Oxidative Cyclization ◽  
Metal Free ◽  
Cyclization Process

Tandem radical cyclization to construct poly-brominated 2-oxindoles

2017 ◽  
Vol 15 (36) ◽  
pp. 7710-7714 ◽  
Author(s):  
Fengjuan Chen ◽  
Yajun Wang ◽  
Shijun Zhao ◽  
Wei Jiang ◽  
Congde Huo
Keyword(s):  
Radical Cyclization ◽  
Metal Free ◽  
Cyclization Process ◽  
Higher Temperature

A metal-free aerobic way to construct tribromomethylated poly-brominated 2-oxindoles from reaction of N-arylacrylamides with CBr4via a tandem radical cyclization process was discovered. The formation of the 1,1-dibromoolefin derivatives was also realized at higher temperature.

ChemInform Abstract: DDQ/TBHP-Induced Oxidative Cyclization Process: A Metal-Free Approach for the Synthesis of 2-Phenylquinazolines.

ChemInform ◽  
2012 ◽  
Vol 43 (42) ◽  
pp. no-no
Author(s):  
Sridhar Rachakonda ◽  
P. Surya Pratap ◽  
Mandava V. Basaveswara Rao
Keyword(s):  
Oxidative Cyclization ◽  
Metal Free ◽  
Cyclization Process

I2-Catalyzed oxidative dehydrogenative tandem cyclization of 2-methylquinolines, arylamines and 1,4-dioxane

2021 ◽  
Author(s):  
Hongrui Qi ◽  
Yiyan Yan ◽  
Yunfeng Liao ◽  
Furong Jiang ◽  
Hualan Gao ◽  
...  
Keyword(s):  
Metal Free ◽  
Tandem Cyclization

A novel I2-catalyst oxidative dehydrogenative tandem cyclization of 2-methylquinolines, arylamines and 1,4-dioxane for the construction of 2-([2,2′-biquinolin]-3-yloxy)ethan-1-ol derivatives has been developed under metal-free conditions.

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