Acid-Catalyzed Rearrangement of Diaryl Hydrazides for the Efficient Synthesis of Functionalized 2,2‘-Diamino-1,1‘-biaryls

2004 ◽  
Vol 69 (17) ◽  
pp. 5778-5781 ◽  
Author(s):  
Young-Kwan Lim ◽  
Jin-Woo Jung ◽  
Haiwon Lee ◽  
Cheon-Gyu Cho
Keyword(s):  
Efficient Synthesis ◽  
Acid Catalyzed

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.

Efficient Synthesis of Diarylmethylamines via Lewis Acid Catalyzed Friedel–Crafts Reactions of Donor–Acceptor Aziridines with N,N-Dialkylanilines

Synthesis ◽  
2019 ◽  
Vol 52 (02) ◽  
pp. 281-289
Author(s):  
Yerin Kim ◽  
Yong Il Kwon ◽  
Sung-Gon Kim
Keyword(s):  
Lewis Acid ◽  
Efficient Synthesis ◽  
Broad Scope ◽  
Donor Acceptor ◽  
Acid Catalyzed ◽  
High Yields

A method for efficient and mild synthesis of diarylmethylamine scaffold, via Lewis acid catalyzed Friedel–Crafts reaction of donor­–acceptor aziridines with N,N-dialkylanilines to afford a biologically important diarylmethylamine derivatives in high yields (up to 88%), is presented. This reaction is suitable for the synthesis of various diarylmethylamine derivatives and has a broad scope for electron-rich arenes, including dimethoxybenzene.

Highly Efficient Synthesis of Quaternary α-Hydroxy PhosphonatesviaLewis Acid-Catalyzed Hydrophosphonylation of Ketones

2009 ◽  
Vol 351 (16) ◽  
pp. 2567-2572 ◽  
Author(s):  
Xin Zhou ◽  
Yanling Liu ◽  
Lu Chang ◽  
Jiannan Zhao ◽  
Deju Shang ◽  
...  
Keyword(s):  
Efficient Synthesis ◽  
Highly Efficient ◽  
Acid Catalyzed

Nano-silica sulfuric acid catalyzed the efficient synthesis of 1,3,5-triarylbenzenes under microwave irradiation

2012 ◽  
Vol 9 (5) ◽  
pp. 791-798 ◽  
Author(s):  
R. Ghanbaripour ◽  
I. Mohammadpoor-Baltork ◽  
M. Moghadam ◽  
A. R. Khosropour ◽  
S. Tangestaninejad ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Microwave Irradiation ◽  
Efficient Synthesis ◽  
Silica Sulfuric Acid ◽  
Nano Silica ◽  
Acid Catalyzed

Efficient Synthesis of 2,3-Dihydro-1H-Perimidine Derivatives Using HBOB as a Novel Solid Acid Catalyst

2012 ◽  
Vol 65 (1) ◽  
pp. 86 ◽  
Author(s):  
Sunanda B. Phadtare ◽  
R. Vijayraghavan ◽  
Ganapati S. Shankarling ◽  
Douglas R. MacFarlane
Keyword(s):  
Boric Acid ◽  
Efficient Method ◽  
Solid Acid ◽  
Simple Procedure ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Thermal Processes ◽  
Efficient Synthesis ◽  
Acid Catalyzed ◽  
Time Required

An efficient method for the synthesis of substituted 2,3-dihydro-1H-perimidine derivatives is described using bis(oxalato)boric acid (HBOB) as catalyst. The methodology provides an easily handled and recyclable catalyst for this type of reaction as an alternative platform to the conventional acid-catalyzed thermal processes. The time required to complete the reaction using HBOB was found to be shorter than conventional methods. Recycling of the catalyst has been efficiently achieved using a simple procedure.

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