Copper‐Catalyzed Enantioselective Reductive Aldol Reaction of α,β‐Unsaturated Carboxylic Acids to Ketones: Silanes as Activator and Transient Protecting Group

2021 ◽  
Author(s):  
Hirotsugu Suzuki ◽  
Kenji Yoneoka ◽  
Sora Kondo ◽  
Takanori Matsuda
Keyword(s):  
Carboxylic Acids ◽  
Aldol Reaction ◽  
Protecting Group ◽  
Unsaturated Carboxylic Acids ◽  
Reductive Aldol

Perturbation theory of substituent effect. Importance of the field effect in transmission of the substituent effect

1980 ◽  
Vol 45 (6) ◽  
pp. 1655-1661 ◽  
Author(s):  
Robert Ponec
Keyword(s):  
Perturbation Theory ◽  
Carboxylic Acids ◽  
Quantum Chemical ◽  
Substituent Effect ◽  
Field Effect ◽  
Adequate Description ◽  
Meta Position ◽  
Unsaturated Carboxylic Acids

Various quantum chemical approaches to the problem of transmission of the substituent effect were compared. It was shown that inclusion of the electronic repulsion (field effect) was necessary to give a true picture of differences in ρ constants for reactions of the cis and trans isomers of substituted unsaturated carboxylic acids; the same holds for an adequate description of transmission of the substituent effect from the meta position on a given skeleton.

scholarly journals A solvent-dependent chirality-switchable thia-Michael addition to α,β-unsaturated carboxylic acids using a chiral multifunctional thiourea catalyst

2020 ◽  
Vol 11 (21) ◽  
pp. 5572-5576 ◽  
Author(s):  
Noboru Hayama ◽  
Yusuke Kobayashi ◽  
Eriko Sekimoto ◽  
Anna Miyazaki ◽  
Kiyofumi Inamoto ◽  
...  
Keyword(s):  
Carboxylic Acids ◽  
Tertiary Amine ◽  
Michael Addition ◽  
Arylboronic Acid ◽  
Unsaturated Carboxylic Acids

An asymmetric thia-Michael addition of arylthiols to α,β-unsaturated carboxylic acids using a thiourea catalyst that bears arylboronic acid and tertiary amine moieties is reported.

ChemInform Abstract: L-Selectride-Mediated Highly Diastereoselective Asymmetric Reductive Aldol Reaction: Access to an Important Subunit for Bioactive Molecules.

ChemInform ◽  
2009 ◽  
Vol 40 (12) ◽  
Author(s):  
Arun K. Ghosh ◽  
Jorden Kass ◽  
David D. Anderson ◽  
Xiaoming Xu ◽  
Christine Marian
Keyword(s):  
Aldol Reaction ◽  
Bioactive Molecules ◽  
Reductive Aldol

ChemInform Abstract: Copper-ClickFerrophos-Complex-Catalyzed Enantioselective Reductive Aldol Reaction.

ChemInform ◽  
2009 ◽  
Vol 40 (39) ◽  
Author(s):  
Minoru Kato ◽  
Hiroshi Oki ◽  
Kenichi Ogata ◽  
Shin-ichi Fukuzawa
Keyword(s):  
Aldol Reaction ◽  
Reductive Aldol

Nickel-Catalyzed Decarboxylative Difluoroalkylation of α,β-Unsaturated Carboxylic Acids

2016 ◽  
Vol 55 (10) ◽  
pp. 3491-3495 ◽  
Author(s):  
Gang Li ◽  
Tao Wang ◽  
Fan Fei ◽  
Yi-Ming Su ◽  
Yan Li ◽  
...  
Keyword(s):  
Carboxylic Acids ◽  
Unsaturated Carboxylic Acids
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