Tartaric Acid: A Naturally Green and Efficient Di-Functional Brønsted Acid Catalyst for the One-Pot Four-Component Synthesis of Polysubstituted Dihydropyrrol-2-Ones at Ambient Temperature

2016 ◽  
Vol 41 (3) ◽  
pp. 843-849 ◽  
Author(s):  
Farzaneh Mohamadpour ◽  
Malek Taher Maghsoodlou ◽  
Reza Heydari ◽  
Mojtaba Lashkari
Keyword(s):  
Ambient Temperature ◽  
Tartaric Acid ◽  
Acid Catalyst ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
One Pot ◽  
Brönsted Acid ◽  
Brønsted Acid Catalyst ◽  
Brönsted Acid Catalyst ◽  
The One

MIL-101-SO3H metal–organic framework as a Brønsted acid catalyst in Hantzsch reaction: an efficient and sustainable methodology for one-pot synthesis of 1,4-dihydropyridine

2019 ◽  
Vol 43 (17) ◽  
pp. 6806-6814 ◽  
Author(s):  
Nainamalai Devarajan ◽  
Palaniswamy Suresh
Keyword(s):  
Metal Organic Framework ◽  
Acid Catalyst ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
One Pot ◽  
Brönsted Acid ◽  
Brønsted Acid Catalyst ◽  
Metal Organic ◽  
Brönsted Acid Catalyst ◽  
Organic Framework

A straightforward and efficient methodology for the synthesis of the medicinally important 1,4-dihydropyridines has been demonstrated using MIL-101-SO3H metal–organic framework as a sustainable Brønsted 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

scholarly journals Tartaric Acid–Zinc Nitrate as an Efficient Brønsted Acid-Assisted Lewis Acid Catalyst for the Mannich Reaction

2018 ◽  
Vol 42 (9) ◽  
pp. 463-466 ◽  
Author(s):  
Hao Dong ◽  
Qing Liu ◽  
Yuanyu Tian ◽  
Yingyun Qiao
Keyword(s):  
Tartaric Acid ◽  
Lewis Acid ◽  
Mannich Reaction ◽  
Reaction Times ◽  
Acid Catalyst ◽  
Zinc Nitrate ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
One Pot ◽  
Brönsted Acid

Tartaric acid–zinc nitrate has been found to be an efficient Brønsted acid-assisted Lewis acid catalytic system for the facile synthesis of β-amino carbonyl compounds through the one-pot Mannich reaction of aldehydes, aromatic amines and ketones in ethanol at room temperature. Remarkable enhancement of reactivity by tartaric acid (Brønsted acid) was observed in these reactions in the presence of anhydrous zinc nitrate (Lewis acid), due to coordination of the tartaric acid ligand to zinc ions increasing the acidity of the system. This procedure shows some advantages such as mild reaction conditions, short reaction times and high yields.

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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