Metal-free construction of contiguous quaternary stereocentres with a polycyclic framework

2019 ◽  
Vol 55 (32) ◽  
pp. 4631-4634 ◽  
Author(s):  
Wei-Bin Lin ◽  
Yong Mou ◽  
Hai-Yan Lu ◽  
Zhi-Qiang Hu ◽  
Chuan-Feng Chen
Keyword(s):  
Free Acid ◽  
Metal Free ◽  
Free Construction ◽  
Acid Catalyzed

A series of contiguous all-carbon quaternary stereocentres with an arene-annulated polycyclic framework were efficiently constructed by a metal-free acid-catalyzed method.

ChemInform Abstract: Metal-Free, Acid-Catalyzed ortho-Directed Synthesis of Anthranilic Acid Derivatives Using Carbodiimides.

ChemInform ◽  
2015 ◽  
Vol 46 (41) ◽  
pp. no-no
Author(s):  
Adrian S. Culf ◽  
Miroslava Cuperlovic-Culf ◽  
Rodney J. Ouellette ◽  
Andreas Decken
Keyword(s):  
Anthranilic Acid ◽  
Free Acid ◽  
Metal Free ◽  
Directed Synthesis ◽  
Acid Catalyzed ◽  
Anthranilic Acid Derivatives

scholarly journals Metal-Free, Acid-Catalyzed ortho-Directed Synthesis of Anthranilic Acid Derivatives Using Carbodiimides

2015 ◽  
Vol 17 (11) ◽  
pp. 2744-2747 ◽  
Author(s):  
Adrian S. Culf ◽  
Miroslava Čuperlović-Culf ◽  
Rodney J. Ouellette ◽  
Andreas Decken
Keyword(s):  
Anthranilic Acid ◽  
Free Acid ◽  
Metal Free ◽  
Directed Synthesis ◽  
Acid Catalyzed ◽  
Anthranilic Acid Derivatives

scholarly journals Metal-Free Catalysts for the Polymerization of Alkynyl-Based Monomers

Catalysts ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 1 ◽  
Author(s):  
Jie Zhang ◽  
Zhiming Zhang ◽  
Fulin Yang ◽  
Haoke Zhang ◽  
Jingzhi Sun ◽  
...  
Keyword(s):  
Lewis Acid ◽  
Research Focus ◽  
Catalytic Systems ◽  
Metal Free ◽  
Catalyst Free ◽  
Material Sciences ◽  
Acid Catalyzed

Novel polymerizations based on alkyne monomers are becoming a powerful tool to construct polymers with unique structures and advanced functions in the areas of polymer and material sciences, and scientists have been attracted to develop a variety of novel polymerizations in recent decades. Therein, catalytic systems play an indispensable role in the influence of polymerization efficiencies and the performances of the resultant polymers. Concerning the shortcomings of metallic catalysts, much of the recent research focus has been on metal-free polymerization systems. In this paper, metal-free catalysts are classified and the corresponding polymerizations are reviewed, including organobase-catalyzed polymerizations, Lewis-acid-catalyzed polymerizations, as well as catalyst-free polymerizations. Moreover, the challenges and perspectives in this area are also briefly discussed.

Brønsted Acid-Catalyzed Solvent-Controlled Regioselective Hydrothiolation and Diastereoselective Cascade Cyclization of Dienes

2021 ◽  
Author(s):  
Kai Ji ◽  
Ka Lu ◽  
Jie Huang ◽  
Zi-Hao Li ◽  
Tong-Mei Ding ◽  
...  
Keyword(s):  
Free Atom ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Metal Free ◽  
Cascade Cyclization ◽  
Brönsted Acid ◽  
Acid Catalyzed ◽  
First Time

A highly regio- and diastereo-selective Brønsted acid-catalyzed tandem hydrothiolation/Friedel-Crafts reaction of linear 1,3-dienes has been developed for the first time, which provides a metal-free, atom-economic and concise way of constructing...

scholarly journals Brønsted acid-catalyzed metal-free one-pot synthesis of benzimidazoles via [4+1] heteroannulation of ortho-phenylenediamines with β-oxodithioesters

ARKIVOC ◽  
2017 ◽  
Vol 2018 (2) ◽  
pp. 81-89
Author(s):  
Abhijeet Srivastava ◽  
Gaurav Shukla ◽  
Dhananjay Yadav ◽  
Maya Shankar Singh
Keyword(s):  
Bronsted Acid ◽  
Brønsted Acid ◽  
One Pot ◽  
Metal Free ◽  
One Pot Synthesis ◽  
Brönsted Acid ◽  
Acid Catalyzed

Metal-free construction of tricyclic or tetracyclic compounds—acid-promoted synthesis of benzo[4,5]imidazo[2,1-a]isoindole and 1,2-dialkyl-2,3-dihydrobenzimidazoles

Tetrahedron ◽  
2013 ◽  
Vol 69 (1) ◽  
pp. 316-319 ◽  
Author(s):  
Jinying Chen ◽  
Jinpeng Qu ◽  
Yuanqing Zhang ◽  
Yongxin Chen ◽  
Na Liu ◽  
...  
Keyword(s):  
Metal Free ◽  
Free Construction

De novo synthesis of benzofurans via trifluoroacetic acid catalyzed cyclization/oxidative aromatization cascade reaction of 2-hydroxy-1,4-diones

2019 ◽  
Vol 17 (32) ◽  
pp. 7547-7551 ◽  
Author(s):  
Qiang Sha ◽  
Haixuan Liu
Keyword(s):  
Trifluoroacetic Acid ◽  
De Novo ◽  
Cascade Reaction ◽  
De Novo Synthesis ◽  
Simple Metal ◽  
Metal Free ◽  
Aromatization Reaction ◽  
Oxidative Aromatization ◽  
Acid Catalyzed

A simple metal-free cyclization/oxidative aromatization reaction starting from 2-hydroxy-1,4-diones for the de novo synthesis of benzofurans was developed.

Three-component 3-(phosphoryl)methylindole synthesis from indoles, H-phosphine oxides and carbonyl compounds under metal-free conditions

2019 ◽  
Vol 21 (4) ◽  
pp. 792-797 ◽  
Author(s):  
Jiaoting Pan ◽  
Runmin Zhao ◽  
Jiami Guo ◽  
Dumei Ma ◽  
Ying Xia ◽  
...  
Keyword(s):  
Carbonyl Compounds ◽  
Indole Derivatives ◽  
Phosphine Oxides ◽  
One Pot ◽  
Metal Free ◽  
Three Component Reaction ◽  
Acid Catalyzed

The first facile and efficient acid-catalyzed three-component reaction of indoles, H-phosphine oxides and carbonyl compounds has been developed, providing a general, one-pot approach to structurally diverse C3-alkylated indole derivatives.

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