Brønsted acid-catalyzed metal- and solvent-free quinoline synthesis fromN-alkyl anilines and alkynes or alkenes

2018 ◽  
Vol 20 (1) ◽  
pp. 261-265 ◽  
Author(s):  
Waqar Ahmed ◽  
Sheng Zhang ◽  
Xiaoqiang Yu ◽  
Yoshinori Yamamoto ◽  
Ming Bao
Keyword(s):  
Efficient Method ◽  
Solvent Free ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Acid Catalyzed ◽  
Green Conditions

A convenient and efficient method for quinoline synthesis was developed using simple and readily available starting materials under green conditions.

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.

Solvent-free Brønsted acid-catalyzed Michael addition of nitrogen- and carbon-containing nucleophiles by ultrasound activation

2014 ◽  
Vol 55 (5) ◽  
pp. 1002-1005 ◽  
Author(s):  
Xiu-Jiang Du ◽  
Zhi-Peng Wang ◽  
Yan-Ling Hou ◽  
Cheng Zhang ◽  
Zheng-Ming Li ◽  
...  
Keyword(s):  
Michael Addition ◽  
Solvent Free ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Acid Catalyzed ◽  
Ultrasound Activation

Brønsted Acid Catalyzed C3-Alkylation of 2-Indolylmethanols with Azlactones via an Umpolung Strategy

Synthesis ◽  
2017 ◽  
Vol 49 (17) ◽  
pp. 4025-4034 ◽  
Author(s):  
Yang Shen ◽  
Zi-Qi Zhu ◽  
Jin-Xi Liu ◽  
Lei Yu ◽  
Bai-Xiang Du ◽  
...  
Keyword(s):  
Efficient Method ◽  
Direct Synthesis ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
New Strategy ◽  
Acid Catalyzed ◽  
High Yields

An efficient method for the synthesis of C3-alkylated indoles has been established via Brønsted acid catalyzed alkylation of 2-indolylmethanols with azlactones. The reaction exhibits broad substrate scope and delivers high yields (22 examples, up to 99% yield). This approach not only provides a new strategy for the direct synthesis of C3-alkylated indoles, but also represents a rarely reported alkylation between indole motifs and electron-rich synthons at the C3 position. This protocol serves as a good example of the application of the umpolung strategy in the synthesis of C3-alkylated indoles from 2-indolylmethanols.

Solvent-Free Acetalization of Glycerol with n-Octanal using Combined Brønsted Acid-Surfactant Catalyst

2017 ◽  
Vol 54 (1) ◽  
pp. 54-63 ◽  
Author(s):  
Xu Li ◽  
Lan Wu ◽  
Qiong Tang ◽  
Jinxiang Dong
Keyword(s):  
Solvent Free ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid

Synthetic Scope of Brønsted Acid-Catalyzed Reactions of Carbonyl Compounds and Ethyl Diazoacetate

2021 ◽  
Author(s):  
Mizzanoor Rahaman ◽  
M. Shahnawaz Ali ◽  
Khorshada Jahan ◽  
Damon Hinz ◽  
Jawad Bin Belayet ◽  
...  
Keyword(s):  
Carbonyl Compounds ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Ethyl Diazoacetate ◽  
Brönsted Acid ◽  
Acid Catalyzed ◽  
Catalyzed Reactions

Brønsted Acid-Catalyzed Friedel-Crafts-type Alkylation of Arenes with αAryl Diazoacetates

2021 ◽  
pp. 152751
Author(s):  
Wenming Chen ◽  
Guifang Chen ◽  
Biao Wang ◽  
Wei Wang ◽  
Wei Huang ◽  
...  
Keyword(s):  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Acid Catalyzed

Brønsted Acid Catalyzed (4 + 2) Cyclocondensation of 3-Substituted Indoles with Donor–Acceptor Cyclopropanes

2021 ◽  
Author(s):  
Alesandere Ortega ◽  
Uxue Uria ◽  
Tomás Tejero ◽  
Liher Prieto ◽  
Efraim Reyes ◽  
...  
Keyword(s):  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Donor Acceptor ◽  
Acid Catalyzed
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