Brønsted acid activation of α-diazo imide: a syn-selective glycolate Mannich reaction

2009 ◽  
pp. 6195 ◽  
Author(s):  
Timothy L. Troyer ◽  
Hubert Muchalski ◽  
Jeffrey N. Johnston
Keyword(s):  
Mannich Reaction ◽  
Acid Activation ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid

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.

Polyelectrolyte Brønsted acid catalyzed three-component Mannich reactions accelerated by emulsion

RSC Advances ◽  
2016 ◽  
Vol 6 (45) ◽  
pp. 39343-39347 ◽  
Author(s):  
Xi Chen ◽  
Huaming Sun ◽  
Yanlong Luo ◽  
Yajun Jian ◽  
Ya Wu ◽  
...  
Keyword(s):  
Polyacrylic Acid ◽  
Mannich Reaction ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Mannich Reactions ◽  
Brönsted Acid ◽  
Acid Catalyzed

An effective polyelectrolyte Brønsted acid (polyacrylic acid) catalyzed three-component Mannich reaction accelerated by emulsion has been developed.

Direct Asymmetric Hydrosilylation of Indoles: Combined Lewis Base and Brønsted Acid Activation

2011 ◽  
Vol 123 (45) ◽  
pp. 10849-10852 ◽  
Author(s):  
You-Cai Xiao ◽  
Chao Wang ◽  
Yuan Yao ◽  
Jian Sun ◽  
Ying-Chun Chen
Keyword(s):  
Lewis Base ◽  
Acid Activation ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid

scholarly journals Geminal Brønsted Acid Ionic Liquids as Catalysts for the Mannich Reaction in Water

2014 ◽  
Vol 15 (5) ◽  
pp. 8656-8666 ◽  
Author(s):  
Leqin He ◽  
Shenjun Qin ◽  
Tao Chang ◽  
Yuzhuang Sun ◽  
Jiquan Zhao
Keyword(s):  
Ionic Liquids ◽  
Mannich Reaction ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
The Mannich Reaction ◽  
Reaction In Water

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.

Brønsted Acid Activation of the Imine

2011 ◽  
pp. 1
Author(s):  
V. K. Aggarwal ◽  
E. M. McGarrigle ◽  
M. A. Shaw
Keyword(s):  
Acid Activation ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid
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