scholarly journals Chiral Brønsted Acid from a Cationic Gold(I) Complex: Catalytic Enantioselective Protonation of Silyl Enol Ethers of Ketones

2011 ◽  
Vol 133 (34) ◽  
pp. 13248-13251 ◽  
Author(s):  
Cheol Hong Cheon ◽  
Osamu Kanno ◽  
F. Dean Toste
Keyword(s):  
Bronsted Acid ◽  
Brønsted Acid ◽  
Enol Ethers ◽  
Silyl Enol Ethers ◽  
Brönsted Acid ◽  
Chiral Bronsted Acid ◽  
Cationic Gold

Enantioselective Protonation of Silyl Enol Ethers Catalyzed by a Chiral Pentacarboxycyclopentadiene-Based Brønsted Acid

Synlett ◽  
2019 ◽  
Vol 30 (11) ◽  
pp. 1317-1320 ◽  
Author(s):  
Jun Li ◽  
Shaoyu An ◽  
Chao Yuan ◽  
Pingfan Li
Keyword(s):  
Acid Catalyst ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Enol Ethers ◽  
Silyl Enol Ethers ◽  
Brönsted Acid ◽  
Brønsted Acid Catalyst ◽  
Proton Source ◽  
Aryl Ketones ◽  
Chiral Bronsted Acid

The enantioselective protonation of silyl enol ethers was realized in the presence of a pentacarboxycyclopenta-1,3-diene-based chiral Brønsted acid catalyst with water as an achiral proton source to give the corresponding α-aryl ketones in good yields and up to 75% ee.

Brønsted acid mediated N–O bond cleavage for α-amination of ketones through the aromatic nitroso aldol reaction

2016 ◽  
Vol 52 (15) ◽  
pp. 3215-3218 ◽  
Author(s):  
Isai Ramakrishna ◽  
Harekrishna Sahoo ◽  
Mahiuddin Baidya
Keyword(s):  
Bond Cleavage ◽  
Aldol Reaction ◽  
Nitroso Compounds ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Enol Ethers ◽  
Silyl Enol Ethers ◽  
Brönsted Acid ◽  
Aromatic Nitroso Compounds

A Brønsted acid mediated N–O bond cleavage for α-amination of ketones has been developed through the nitroso aldol reaction of less-reactive aromatic nitroso compounds and silyl enol ethers having a disilane (–SiMe2TMS) backbone.

Practical catalytic enantioselective synthesis of 2,3-dihydroquin-azolinones by chiral brønsted acid catalysis

2021 ◽  
Author(s):  
Yongbiao Guo ◽  
Zhenhua Gao ◽  
Junchen Li ◽  
Xiaojing Bi ◽  
Enxue Shi ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Acid Catalysis ◽  
Enantioselective Synthesis ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Chiral Bronsted Acid ◽  
Bronsted Acid Catalysis

An efficient, practical and scalable protocol to prepare chiral 2,3-dihydroquinazolinones was developed under catalysis of spirocyclic SPINOL-phosphoric acid.

Cooperative Catalysis with Iron and a Chiral Brønsted Acid for Asymmetric Reductive Amination of Ketones

2014 ◽  
Vol 356 (16) ◽  
pp. 3451-3455 ◽  
Author(s):  
Shaolin Zhou ◽  
Steffen Fleischer ◽  
Haijun Jiao ◽  
Kathrin Junge ◽  
Matthias Beller
Keyword(s):  
Reductive Amination ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Cooperative Catalysis ◽  
Brönsted Acid ◽  
Chiral Bronsted Acid
Sign in / Sign up

Export Citation Format

Share Document