ChemInform Abstract: Lewis Base Activation of Lewis Acids: Catalytic Enantioselective Glycolate Aldol Reactions.

ChemInform ◽  
2008 ◽  
Vol 39 (28) ◽  
Author(s):  
Scott E. Denmark ◽  
Won-jin Chung
Keyword(s):  
Lewis Acids ◽  
Lewis Base ◽  
Aldol Reactions

Lewis Base Activation of Lewis Acids: Catalytic Enantioselective Glycolate Aldol Reactions

2008 ◽  
Vol 120 (10) ◽  
pp. 1916-1918 ◽  
Author(s):  
Scott E. Denmark ◽  
Won-jin Chung
Keyword(s):  
Lewis Acids ◽  
Lewis Base ◽  
Aldol Reactions

Lewis Base Activation of Lewis Acids. Vinylogous Aldol Reactions

2003 ◽  
Vol 125 (26) ◽  
pp. 7800-7801 ◽  
Author(s):  
Scott E. Denmark ◽  
Gregory L. Beutner
Keyword(s):  
Lewis Acids ◽  
Lewis Base ◽  
Aldol Reactions

scholarly journals Lewis Base Activation of Lewis Acids. Vinylogous Aldol Reactions.

ChemInform ◽  
2003 ◽  
Vol 34 (44) ◽  
Author(s):  
Scott E. Denmark ◽  
Gregory L. Beutner
Keyword(s):  
Lewis Acids ◽  
Lewis Base ◽  
Aldol Reactions

Lewis Base Activation of Lewis Acids:  Development of a Lewis Base Catalyzed Selenolactonization

2007 ◽  
Vol 9 (19) ◽  
pp. 3801-3804 ◽  
Author(s):  
Scott E. Denmark ◽  
William R. Collins
Keyword(s):  
Lewis Acids ◽  
Lewis Base

Lewis Base Activation of Lewis Acids. Addition of Silyl Ketene Acetals to Aldehydes

2002 ◽  
Vol 124 (45) ◽  
pp. 13405-13407 ◽  
Author(s):  
Scott E. Denmark ◽  
Thomas Wynn ◽  
Gregory L. Beutner
Keyword(s):  
Lewis Acids ◽  
Lewis Base ◽  
Ketene Acetals ◽  
Silyl Ketene Acetals

scholarly journals The Nature of Triel Bonds, a Case of B and Al Centres Bonded with Electron Rich Sites

Molecules ◽  
2020 ◽  
Vol 25 (11) ◽  
pp. 2703 ◽  
Author(s):  
Sławomir J. Grabowski
Keyword(s):  
Lewis Acids ◽  
Weak Interactions ◽  
Lewis Base ◽  
Basis Set ◽  
Strong Interactions ◽  
Orbital Method ◽  
Covalent Bonds ◽  
Moller Plesset ◽  
Intermolecular Distances ◽  
Base Units

The second-order Møller–Plesset perturbation theory calculations with the aug-cc-pVTZ basis set were performed on complexes of triel species: BCl3, BH3, AlCl3, and AlH3 acting as Lewis acids through the B or Al centre with Lewis base units: NCH, N2, NH3, and Cl− anion. These complexes are linked by triel bonds: B/Al⋅⋅⋅N or B/Al⋅⋅⋅Cl. The Quantum Theory of ´Atoms in Molecules´ approach, Natural Bond Orbital method, and the decomposition of energy of interaction were applied to characterise the latter links. The majority of complexes are connected through strong interactions possessing features of covalent bonds and characterised by short intermolecular distances, often below 2 Å. The BCl3⋅⋅⋅N2 complex is linked by a weak interaction corresponding to the B⋅⋅⋅N distance of ~3 Å. For the BCl3⋅⋅⋅NCH complex, two configurations corresponding to local energetic minima are observed, one characterised by a short B⋅⋅⋅N distance and a strong interaction and another one characterised by a longer B⋅⋅⋅N distance and a weak triel bond. The tetrahedral triel structure is observed for complexes linked by strong triel bonds, while, for complexes connected by weak interactions, the structure is close to the trigonal pyramid, particularly observed for the BCl3⋅⋅⋅N2 complex.

Spiro[4,4]-1,6-Nonadiene-Based Diphosphine Oxides in Lewis Base Catalyzed Asymmetric Double-Aldol Reactions

2013 ◽  
Vol 52 (42) ◽  
pp. 11054-11058 ◽  
Author(s):  
Panke Zhang ◽  
Zhaobin Han ◽  
Zheng Wang ◽  
Kuiling Ding
Keyword(s):  
Lewis Base ◽  
Aldol Reactions
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