The intramolecular reaction of acetophenone N-tosylhydrazone and vinyl: Brønsted acid-promoted cationic cyclization toward polysubstituted indenes

2021 ◽  
Vol 57 (14) ◽  
pp. 1810-1813
Author(s):  
Zhixin Wang ◽  
Yang Li ◽  
Fan Chen ◽  
Peng-Cheng Qian ◽  
Jiang Cheng
Keyword(s):  
Intramolecular Cyclization ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Intramolecular Reaction ◽  
Acetophenone Derivatives ◽  
Brönsted Acid ◽  
Cationic Cyclization

In the presence of TsNHNH2, a Brønsted acid-promoted intramolecular cyclization of o-(1-arylvinyl) acetophenone derivatives was developed, leading to polysubstituted indenes with complexity and diversity in moderate to excellent yields.

Brønsted acid-catalyzed synthesis of carbazoles from 2-substituted indoles

2014 ◽  
Vol 1 (10) ◽  
pp. 1197-1200 ◽  
Author(s):  
Qingjiang Li ◽  
Xiao-Shui Peng ◽  
Henry N. C. Wong
Keyword(s):  
Intramolecular Cyclization ◽  
Sonogashira Coupling ◽  
Terminal Alkynes ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Efficient Approach ◽  
Brönsted Acid ◽  
Acid Catalyzed

A simple and efficient approach for the synthesis of disubstituted carbazoles has been developed from o-haloanilines and terminal alkynes using a two-step strategy, namely, Sonogashira coupling and intramolecular cyclization.

Metal-free Brønsted acid mediated synthesis of fully substituted thiophenes via chemo- and regioselective intramolecular cyclization of α,α′-bis(β-oxodithioesters) at room temperature

2016 ◽  
Vol 14 (2) ◽  
pp. 434-439 ◽  
Author(s):  
B. Janaki Ramulu ◽  
Suvajit Koley ◽  
Maya Shankar Singh
Keyword(s):  
Intramolecular Cyclization ◽  
Room Temperature ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Metal Free ◽  
Brönsted Acid

Metal-free Brønsted acid mediated synthesis of tetrasubstituted thiophenes via intramolecular cyclization of α,α′-bis(β-oxodithioesters) is devised at room temperature.

Catalytic enantioselective intramolecular cyclization of N-aryl diazoamides using a titanium–BINOLate complex

2014 ◽  
Vol 50 (24) ◽  
pp. 3220-3223 ◽  
Author(s):  
Takuya Hashimoto ◽  
Kumiko Yamamoto ◽  
Keiji Maruoka
Keyword(s):  
Intramolecular Cyclization ◽  
Lewis Acid ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Chiral Lewis Acid

Catalytic enantioselective intramolecular cyclization of N-aryl diazoamides was achieved by using titanium–BINOLate as a chiral Lewis acid-assisted Brønsted acid.

Brönsted Acid-Mediated Intramolecular Cyclization of Biaryl Triazenes for the Synthesis of Fluorenes and 9,10-Dihydro-Phenanthrenes

2014 ◽  
Vol 79 (19) ◽  
pp. 9206-9221 ◽  
Author(s):  
Lijun Xu ◽  
Weijun Yang ◽  
Lili Zhang ◽  
Maozhong Miao ◽  
Zhigen Yang ◽  
...  
Keyword(s):  
Intramolecular Cyclization ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid

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
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