Radical Addition Reaction between Chromenols and Toluene Derivatives Initiated by Brønsted Acid Catalyst under Light Irradiation

2021 ◽  
Author(s):  
jun kikuchi ◽  
Shota Kodama ◽  
Masahiro Terada
Keyword(s):  
Addition Reaction ◽  
Acid Catalyst ◽  
Radical Addition ◽  
Light Irradiation ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Brønsted Acid Catalyst ◽  
Acid Catalyzed ◽  
Brönsted Acid Catalyst

A Brønsted acid-catalyzed benzylic C(sp3)-H functionalization of toluene and its derivatives was accomplished through the photo-excitation of benzopyrylium cation intermediates. Light irradiation promoted the reaction of chromenols with toluene and...

Chiral strong Brønsted acid-catalyzed enantioselective addition reaction of simple olefins with ethyl glyoxylate

2020 ◽  
Vol 7 (11) ◽  
pp. 1383-1387
Author(s):  
Jun Kikuchi ◽  
Yuki Aizawa ◽  
Masahiro Terada
Keyword(s):  
Addition Reaction ◽  
Acid Catalyst ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Brønsted Acid Catalyst ◽  
Acid Catalyzed ◽  
Enantioselective Addition ◽  
Brönsted Acid Catalyst

An enantioselective intermolecular addition reaction of 1,1,2-trisubstituted and 1,2- disubstituted simple olefins with ethyl glyoxylate was developed using F10BINOL-derived N-sulfonyl phosphoramide as a chiral strong Brønsted acid catalyst.

Brønsted acid-catalyzed Mannich reaction through dual activation of aldehydes and N-Boc-imines

2015 ◽  
Vol 51 (92) ◽  
pp. 16472-16474 ◽  
Author(s):  
Taichi Kano ◽  
Yusuke Aota ◽  
Daisuke Asakawa ◽  
Keiji Maruoka
Keyword(s):  
Mannich Reaction ◽  
Acid Catalyst ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Iminium Salts ◽  
Brönsted Acid ◽  
Brønsted Acid Catalyst ◽  
Acid Catalyzed ◽  
Dual Activation ◽  
Brönsted Acid Catalyst

In the presence of a Brønsted acid catalyst, both aldehydes and N-Boc-aminals were converted to enecarbamates and N-Boc-iminium salts as activated nucleophiles and electrophiles, respectively, giving unprecedented Mannich adducts.

o-Benzenedisulfonimide as Reusable Brønsted Acid Catalyst for Acid-Catalyzed Organic Reactions

Synthesis ◽  
2008 ◽  
Vol 2008 (9) ◽  
pp. 1379-1388 ◽  
Author(s):  
Margherita Barbero ◽  
Silvano Cadamuro ◽  
Stefano Dughera ◽  
Paolo Venturello
Keyword(s):  
Acid Catalyst ◽  
Organic Reactions ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Brønsted Acid Catalyst ◽  
Acid Catalyzed ◽  
Brönsted Acid Catalyst

Methylation of Polyols with Trimethylphosphate in the Presence of a Lewis or Brønsted Acid Catalyst

ChemSusChem ◽  
2018 ◽  
Vol 11 (3) ◽  
pp. 547-551 ◽  
Author(s):  
Marie-Christine Duclos ◽  
Aurélien Herbinski ◽  
Anne-Sophie Mora ◽  
Estelle Métay ◽  
Marc Lemaire
Keyword(s):  
Acid Catalyst ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Brønsted Acid Catalyst ◽  
Brönsted Acid Catalyst

scholarly journals The Hexameric Resorcinarene Capsule as a Brønsted Acid Catalyst for the Synthesis of Bis(heteroaryl)methanes in a Nanoconfined Space

2019 ◽  
Vol 7 ◽  
Author(s):  
Stefania Gambaro ◽  
Pellegrino La Manna ◽  
Margherita De Rosa ◽  
Annunziata Soriente ◽  
Carmen Talotta ◽  
...  
Keyword(s):  
Acid Catalyst ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Brønsted Acid Catalyst ◽  
Brönsted Acid Catalyst

Divergent access to N-hydroxypyrroles and isoxazoles via the gold(i)- or Brønsted acid-catalysed regioselective cyclization of N-(2-trifluoromethyl-3-alkynyl) oximes

2018 ◽  
Vol 16 (8) ◽  
pp. 1375-1380 ◽  
Author(s):  
Qin Zeng ◽  
Li Zhang ◽  
Yuanjing Xiao ◽  
Junliang Zhang
Keyword(s):  
Acid Catalyst ◽  
Suitable Choice ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Brønsted Acid Catalyst ◽  
Brönsted Acid Catalyst

The divergent regioselective cyclization of N-(2-trifluoromethyl-3-alkynyl) oximes by a suitable choice of a gold(i) or Brønsted acid catalyst, leading to N-hydroxypyrroles or Isoxazoles was developed.

A Zr-Al-Beta zeolite with open Zr(iv) sites: an efficient bifunctional Lewis–Brønsted acid catalyst for a cascade reaction

2019 ◽  
Vol 9 (15) ◽  
pp. 4055-4065 ◽  
Author(s):  
Gang Li ◽  
Lou Gao ◽  
Zhizheng Sheng ◽  
Yulu Zhan ◽  
Chaoyang Zhang ◽  
...  
Keyword(s):  
High Activity ◽  
Acid Catalyst ◽  
Cascade Reaction ◽  
Beta Zeolite ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Brønsted Acid Catalyst ◽  
One Step ◽  
Brönsted Acid Catalyst

A simple one-step strategy for the preparation of a bifunctional Zr-Al-Beta zeolite with external open Zr(iv) sites, showing high activity for the cascade reaction.

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