Brønsted acid (HNO3)-catalyzed tandem reaction of α-ketoesters and arylamines: efficient synthesis of 1,2-dihydroquinoline derivatives

2011 ◽  
Vol 52 (22) ◽  
pp. 2903-2905 ◽  
Author(s):  
Xiao-Yu Hu ◽  
Ji-Chen Zhang ◽  
Wei Wei ◽  
Jian-Xin Ji
Keyword(s):  
Tandem Reaction ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Efficient Synthesis ◽  
Brönsted Acid

Efficient Synthesis of Chromenes from Vinyl o-Quinone Methides via a Brønsted Acid Catalyzed Electrocyclization Process

Synthesis ◽  
2018 ◽  
Vol 50 (12) ◽  
pp. 2416-2422 ◽  
Author(s):  
Man-Su Tu ◽  
Guang-Jian Mei ◽  
Feng Shi ◽  
Si-Jia Liu ◽  
Xiao-Li Jiang ◽  
...  
Keyword(s):  
Efficient Method ◽  
Research Area ◽  
Environmentally Benign ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Efficient Synthesis ◽  
Quinone Methides ◽  
Efficient Approach ◽  
Brönsted Acid ◽  
Acid Catalyzed

An efficient approach for the synthesis of chromene derivatives from vinyl o-quinone methides was established via a Brønsted acid catalyzed electrocyclization. By using this methodology, a series of structurally diversified chromenes was synthesized in a highly atom-economic and environmentally benign manner with generally good to excellent yields (up to 98% yield). This reaction will not only provide an efficient method for the construction of chromene scaffolds, but also enrich the research area of o-quinone methides.

Brønsted acid cocatalysis in photocatalytic intramolecular coupling of tertiary amines: efficient synthesis of 2-arylindols

2016 ◽  
Vol 14 (31) ◽  
pp. 7447-7450 ◽  
Author(s):  
Xiaoqian Yuan ◽  
Xinxin Wu ◽  
Shupeng Dong ◽  
Guibing Wu ◽  
Jinxing Ye
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Room Temperature ◽  
Coupling Reaction ◽  
Bronsted Acid ◽  
Tertiary Amines ◽  
Brønsted Acid ◽  
Efficient Synthesis ◽  
Unsaturated Ketones ◽  
Brönsted Acid

We report herein a highly efficient intramolecular coupling reaction of tertiary amines and ketones (α,β-unsaturated ketones) by using a Brønsted acid as a cocatalyst, affording 2-arylindols in good to excellent yields (up to 92%) under visible light irradiation at room temperature.

The first example of glucose-containing carbene Brønsted acid synthesis and catalysis: efficient synthesis of five substituted tetrahydropyridines

Tetrahedron ◽  
2015 ◽  
Vol 71 (38) ◽  
pp. 7070-7072 ◽  
Author(s):  
Qiu-ju Zhou ◽  
Yu Wan ◽  
Xiao-xiao Zhang ◽  
Li-zhuo Zhang ◽  
Huan Zou ◽  
...  
Keyword(s):  
Acid Synthesis ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Efficient Synthesis ◽  
Brönsted Acid

Efficient synthesis of chiral cyclic acetals by metal and Brønsted acid co-catalyzed enantioselective four-component cascade reactions

2014 ◽  
Vol 50 (17) ◽  
pp. 2196-2198 ◽  
Author(s):  
Lin Qiu ◽  
Xin Guo ◽  
Chaoqun Ma ◽  
Huang Qiu ◽  
Shunying Liu ◽  
...  
Keyword(s):  
Michael Addition ◽  
Cascade Reactions ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Efficient Synthesis ◽  
Mannich Reactions ◽  
Cyclic Acetals ◽  
Brönsted Acid

Four-component Mannich reactions subsequently followed by an intramolecular oxo-Michael addition were developed to efficiently produce chiral cyclic acetals with high diastereoselectivity and enantioselectivity.

Efficient synthesis of pyrrolo[1,2-a]quinoxalines catalyzed by a Brønsted acid through cleavage of C–C bonds

2016 ◽  
Vol 14 (36) ◽  
pp. 8529-8535 ◽  
Author(s):  
Caixia Xie ◽  
Lei Feng ◽  
Wanli Li ◽  
Xiaojun Ma ◽  
Xinkun Ma ◽  
...  
Keyword(s):  
Direct Synthesis ◽  
Domino Reaction ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Efficient Synthesis ◽  
One Pot ◽  
Keto Esters ◽  
Brönsted Acid

An efficient and convenient one-pot domino reaction for the direct synthesis of pyrrolo[1,2-a]quinoxalines has been developed. β-Diketones and β-keto esters are well tolerated to give the corresponding products in moderate to excellent yields.

Brønsted Acid-Promoted Divergent Reactions of Enaminones: Efficient Synthesis of Fused Pyrroles with Different Substitution Patterns

2012 ◽  
Vol 354 (13) ◽  
pp. 2504-2510 ◽  
Author(s):  
Bo Jiang ◽  
Mian-Shuai Yi ◽  
Man-Su Tu ◽  
Shu-Liang Wang ◽  
Shu-Jiang Tu
Keyword(s):  
Bronsted Acid ◽  
Brønsted Acid ◽  
Efficient Synthesis ◽  
Brönsted Acid
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