A Brønsted Acid-Amino Acid as a Synergistic Catalyst for Asymmetric List-Lerner-Barbas Aldol Reactions

2016 ◽  
Vol 81 (6) ◽  
pp. 2405-2419 ◽  
Author(s):  
Dhevalapally B. Ramachary ◽  
Kodambahalli S. Shruthi
Keyword(s):  
Amino Acid ◽  
Aldol Reactions ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid

scholarly journals Chiral phosphine-mediated intramolecular [3 + 2] annulation: enhanced enantioselectivity by achiral Brønsted acid

2017 ◽  
Vol 8 (7) ◽  
pp. 5196-5200 ◽  
Author(s):  
Weijun Yao ◽  
Zhaoyuan Yu ◽  
Shan Wen ◽  
Huanzhen Ni ◽  
Nisar Ullah ◽  
...  
Keyword(s):  
Amino Acid ◽  
Bronsted Acids ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid

Enantioselective intramolecular [3 + 2] annulation of chalcone–allenes catalyzed by amino acid-derived phosphines and achiral Brønsted acids has been developed.

scholarly journals Organocatalytic Synthesis of α,α–Diaryl Substituted α–Amino Acid Derivatives by an Interrupted Three-Component Ugi Reaction

2019 ◽  
Vol 92 (2) ◽  
pp. 203-209 ◽  
Author(s):  
Danijel Glavač ◽  
Ivanka Jerić ◽  
Matija Gredičak
Keyword(s):  
Reaction Mechanism ◽  
Amino Acid ◽  
Ugi Reaction ◽  
Amino Acid Derivatives ◽  
Acid Catalysts ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Bronsted Acid Catalysts

An organocatalytic interrupted three-component Ugi reaction for the synthesis of α,α–diaryl α–amino acid derivatives is described. The transformation proceeds with a range of isocyanides and 3-aryl isoindolinone alcohols using Brønsted acid catalysts to afford products in good to excellent yields. Based on the obtained results, a reaction mechanism is proposed and discussed.

Auto-oxidation promoted sp3 C–H arylation of glycine derivatives

2018 ◽  
Vol 16 (27) ◽  
pp. 4985-4989 ◽  
Author(s):  
Yuanyuan Wei ◽  
Jie Wang ◽  
Yajun Wang ◽  
Xiaoqiang Yao ◽  
Caixia Yang ◽  
...  
Keyword(s):  
Amino Acid ◽  
Environmentally Benign ◽  
Amino Acid Derivatives ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Reaction Conditions ◽  
Brönsted Acid ◽  
Reaction Proceeds ◽  
Glycine Derivatives

An auto-oxidation promoted sp3 C–H arylation reaction between N-aryl glycine derivatives and electron-rich arenes, leading to the formation of N-aryl α-aryl α-amino acid derivatives, is described. This atom-economical and environmentally benign reaction proceeds smoothly under mild reaction conditions and requires only Brønsted acid and oxygen (balloon). A plausible radical involved mechanism is proposed.

scholarly journals Brønsted Acid-Catalyzed Epimerization-Free Preparation of Dual-Protected Amino Acid Derivatives

ACS Omega ◽  
2017 ◽  
Vol 2 (6) ◽  
pp. 2967-2976 ◽  
Author(s):  
Pedro P. de Castro ◽  
Isabela M. R. Rimulo ◽  
Angelina M. de Almeida ◽  
Renata Diniz ◽  
Giovanni W. Amarante
Keyword(s):  
Amino Acid ◽  
Amino Acid Derivatives ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Protected Amino Acid ◽  
Brönsted Acid ◽  
Acid Catalyzed
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