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.

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.

Silica-supported methanesulfonic acid — An efficient solid Brønsted acid catalyst for the Pechmann reaction in the presence of higher n-alkanes

2011 ◽  
Vol 89 (6) ◽  
pp. 663-670 ◽  
Author(s):  
J. Joshi ◽  
M.K. Mishra ◽  
M. Srinivasarao
Keyword(s):  
Reaction Times ◽  
Methanesulfonic Acid ◽  
Acid Catalyst ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Spent Catalyst ◽  
Pechmann Reaction ◽  
Brönsted Acid ◽  
Brønsted Acid Catalyst ◽  
Brönsted Acid Catalyst

A cost-effective and efficient solid Brønsted acid catalyst was synthesized by loading methanesulfonic acid (MSA) on silica and was used for the acid-catalyzed Pechmann reaction to test the catalytic activity and its reusability. Derivatives of 4-methylcoumarin were synthesized in good yields within short reaction times in the presence of environmentally friendly higher n-alkanes as solvents. The regeneration study of the spent catalyst showed satisfactory results.

Brønsted acid catalyzed enantio- and diastereoselective one-pot three component Mannich reaction

2015 ◽  
Vol 26 (20) ◽  
pp. 1180-1188 ◽  
Author(s):  
Margherita Barbero ◽  
Silvano Cadamuro ◽  
Stefano Dughera
Keyword(s):  
Mannich Reaction ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
One Pot ◽  
Brönsted Acid ◽  
Acid Catalyzed

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.

One-Pot Conversion of Carbohydrates into 5-(Hydroxymethyl)furfural using Heterogeneous Lewis-Acid and Brønsted-Acid Catalysts

2016 ◽  
Vol 5 (5) ◽  
pp. 747-755 ◽  
Author(s):  
Tingwei Zhang ◽  
Wei Fan ◽  
Wenzhi Li ◽  
Zhiping Xu ◽  
Haosheng Xin ◽  
...  
Keyword(s):  
Lewis Acid ◽  
Acid Catalysts ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
One Pot ◽  
Hydroxymethyl Furfural ◽  
Brönsted Acid ◽  
Bronsted Acid Catalysts

scholarly journals A ternary composite oxides S2O82−/ZrO2–TiO2–SiO2 as an efficient solid super acid catalyst for depolymerization of lignin

RSC Advances ◽  
2017 ◽  
Vol 7 (79) ◽  
pp. 50027-50034 ◽  
Author(s):  
Huizhen Wang ◽  
Wenzhi Li ◽  
Jindong Wang ◽  
Hou-min Chang ◽  
Hasan Jameel ◽  
...  
Keyword(s):  
Lewis Acid ◽  
Acid Catalyst ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Ternary Composite ◽  
Composite Oxides ◽  
Brönsted Acid ◽  
Super Acid ◽  
Lignin Depolymerization

The solid, super, acid catalyst S2O82−/ZrO2–TiO2–SiO2, which has both a strong Brønsted acid and Lewis acid, was prepared and applied in lignin depolymerization.

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