scholarly journals Enantioselective Intramolecular Aldol Reaction Mediated by a Combination of L-Amino Acid and Brønsted Acid to Construct a Bicyclic Enedione Containing a 7-Membered Ring

2007 ◽  
Vol 55 (12) ◽  
pp. 1710-1712 ◽  
Author(s):  
Takashi Nagamine ◽  
Kohei Inomata ◽  
Yasuyuki Endo
Keyword(s):  
Amino Acid ◽  
Aldol Reaction ◽  
Membered Ring ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid

scholarly journals Brønsted Acid Catalyzed Asymmetric Aldol Reaction: A Complementary Approach to Enamine Catalysis

2010 ◽  
Vol 12 (16) ◽  
pp. 3582-3585 ◽  
Author(s):  
Guillaume Pousse ◽  
Fabien Le Cavelier ◽  
Luke Humphreys ◽  
Jacques Rouden ◽  
Jérôme Blanchet
Keyword(s):  
Aldol Reaction ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Asymmetric Aldol ◽  
Complementary Approach ◽  
Brönsted Acid ◽  
Asymmetric Aldol Reaction ◽  
Enamine Catalysis ◽  
Acid Catalyzed

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.

Catalyst-free synthesis of α1-oxindole-α-hydroxyphosphonates via phospha-aldol reaction of isatins employing N-heterocyclic phosphine (NHP)-thiourea

2016 ◽  
Vol 14 (38) ◽  
pp. 8952-8956 ◽  
Author(s):  
Nagaraju Molleti ◽  
Jun Yong Kang
Keyword(s):  
Critical Role ◽  
Aldol Reaction ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Catalyst Free ◽  
Brönsted Acid

A catalyst-free phospha-aldol reaction of isatins with NHP-thiourea has been developed and the critical role of the Brønsted acid in this transformation is unveiled.

A phosphotungstic acid-supported multifunctional organocatalyst containing 9-amino(9-deoxy)epi-cinchonidine and Brønsted acid and its application in asymmetric aldol reaction

RSC Advances ◽  
2016 ◽  
Vol 6 (61) ◽  
pp. 55894-55902 ◽  
Author(s):  
Ling Lan ◽  
Guangxin Xie ◽  
Tao Wu ◽  
Dandan Feng ◽  
Xuebing Ma
Keyword(s):  
Phosphotungstic Acid ◽  
Aldol Reaction ◽  
Catalytic Performance ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Asymmetric Aldol ◽  
Brönsted Acid ◽  
Asymmetric Aldol Reaction ◽  
First Time ◽  
Excellent Catalytic Performance

Phosphotungstic acid-supported multifunctional 9-amino(9-deoxy)epi-cinchonidine containing Brønsted acid was developed through facile precipitation for the first time and afforded aldol adducts in excellent catalytic performance with good reusability.

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.

An environmentally friendly Mukaiyama aldol reaction catalyzed by a strong Brønsted acid in solvent-free conditions

2011 ◽  
Vol 9 (7) ◽  
pp. 2192 ◽  
Author(s):  
Margherita Barbero ◽  
Stefano Bazzi ◽  
Silvano Cadamuro ◽  
Stefano Dughera ◽  
Claudio Magistris ◽  
...  
Keyword(s):  
Aldol Reaction ◽  
Environmentally Friendly ◽  
Solvent Free ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Mukaiyama Aldol Reaction ◽  
Solvent Free Conditions ◽  
Brönsted Acid ◽  
Mukaiyama Aldol
Sign in / Sign up

Export Citation Format

Share Document