Urea- and Thiourea-Substituted Cinchona Alkaloid Derivatives as Highly Efficient Bifunctional Organocatalysts for the Asymmetric Addition of Malonate to Nitroalkenes: Inversion of Configuration at C9 Dramatically Improves Catalyst Performance.

2005 ◽  
Vol 117 (39) ◽  
pp. 6525-6528 ◽  
Author(s):  
Séamus H. McCooey ◽  
Stephen J. Connon
Keyword(s):  
Cinchona Alkaloid ◽  
Asymmetric Addition ◽  
Highly Efficient

Osmylated Macroporous Cinchona Alkaloid Resins: Highly Efficient and Recyclable Catalysts for Asymmetric Dihydroxylation of Olefins.

ChemInform ◽  
2005 ◽  
Vol 36 (13) ◽  
Author(s):  
Yil Sung Park ◽  
Cheon Hee Jo ◽  
Han Young Choi ◽  
Eun Kyung Kwon ◽  
Choong Eui Song
Keyword(s):  
Cinchona Alkaloid ◽  
Asymmetric Dihydroxylation ◽  
Highly Efficient ◽  
Recyclable Catalysts

Cinchona alkaloid-based chiral catalysts act as highly efficient multifunctional organocatalysts for the asymmetric conjugate addition of malonates to nitroolefins

2015 ◽  
Vol 13 (40) ◽  
pp. 10216-10225 ◽  
Author(s):  
Veeramanoharan Ashokkumar ◽  
Ayyanar Siva
Keyword(s):  
Michael Addition ◽  
Quaternary Ammonium ◽  
Conjugate Addition ◽  
Quaternary Ammonium Salts ◽  
Cinchona Alkaloid ◽  
Ammonium Salts ◽  
Addition Reactions ◽  
Chiral Catalysts ◽  
Reaction Conditions ◽  
Highly Efficient

New pentaerythritol tetrabromide based chiral quaternary ammonium salts have been prepared and used as organocatalysts for enantioselective Michael addition reactions between various nitroolefins and Michael donors under mild reaction conditions with very good chemical yields and ee's.

A new pyrrolidine-derived atropisomeric amino alcohol as a highly efficient chiral ligand for the asymmetric addition of diethylzinc to aldehydes

2014 ◽  
Vol 55 (50) ◽  
pp. 6891-6894 ◽  
Author(s):  
Ferenc Faigl ◽  
Zsuzsa Erdélyi ◽  
Szilvia Deák ◽  
Miklós Nyerges ◽  
Béla Mátravölgyi
Keyword(s):  
Amino Alcohol ◽  
Chiral Ligand ◽  
Asymmetric Addition ◽  
Highly Efficient

ChemInform Abstract: A New Pyrrolidine-Derived Atropisomeric Amino Alcohol as a Highly Efficient Chiral Ligand for the Asymmetric Addition of Diethylzinc to Aldehydes.

ChemInform ◽  
2015 ◽  
Vol 46 (18) ◽  
pp. no-no
Author(s):  
Ferenc Faigl ◽  
Zsuzsa Erdelyi ◽  
Szilvia Deak ◽  
Miklos Nyerges ◽  
Bela Matravoelgyi
Keyword(s):  
Amino Alcohol ◽  
Chiral Ligand ◽  
Asymmetric Addition ◽  
Highly Efficient

Asymmetric Addition of Terminal Acetylenes to Aldehydes, Catalyzed by Zn(OTf)2-Cinchona Alkaloid Complexes

Synlett ◽  
2006 ◽  
Vol 2006 (06) ◽  
pp. 885-888 ◽  
Author(s):  
Hans Adolfsson ◽  
Jesper Ekström ◽  
Alexey Zaitsev
Keyword(s):  
Cinchona Alkaloid ◽  
Asymmetric Addition ◽  
Terminal Acetylenes
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