Mixed aggregates: crystal structures of a lithium ketone enolate/lithium amide and of a sodium ester enolate/sodium amide

1990 ◽  
Vol 112 (23) ◽  
pp. 8602-8604 ◽  
Author(s):  
Paul G. Williard ◽  
Mark J. Hintze
Keyword(s):  
Crystal Structures ◽  
Lithium Amide ◽  
Mixed Aggregates ◽  
Ester Enolate ◽  
Sodium Amide

Factors in Aldol Condensations of Alkyl Acetates with Benzophenone and Reversals by Sodium Amide Versus Lithium Amide. Metallic Cation Effects1

1960 ◽  
Vol 25 (8) ◽  
pp. 1296-1302 ◽  
Author(s):  
CHARLES R. HAUSER ◽  
WILLIAM R. DUNNAVANT
Keyword(s):  
Lithium Amide ◽  
Metallic Cation ◽  
Alkyl Acetates ◽  
Amide Versus ◽  
Sodium Amide

Mixed Aggregates:  Lithium Enolate of 3-Pentanone and a Chiral Lithium Amide

2000 ◽  
Vol 122 (32) ◽  
pp. 7829-7830 ◽  
Author(s):  
Chengzao Sun ◽  
Paul G. Williard
Keyword(s):  
Lithium Amide ◽  
Lithium Enolate ◽  
Mixed Aggregates

Mixed Aggregates Containingn-Butyl-,sec-Butyl-, ortert-Butyllithium and a Chiral Lithium Amide Derived fromN-Isopropyl-O-methyl Valinol

1997 ◽  
Vol 119 (48) ◽  
pp. 11693-11694 ◽  
Author(s):  
Paul G. Williard ◽  
Chengzao Sun
Keyword(s):  
Lithium Amide ◽  
Mixed Aggregates

Structure of the Mixed Aggregates between a Chiral Lithium Amide and Phenyllithium or Vinyllithium

2012 ◽  
Vol 31 (13) ◽  
pp. 4801-4809 ◽  
Author(s):  
Hassan Oulyadi ◽  
Catherine Fressigné ◽  
Yi Yuan ◽  
Jacques Maddaluno ◽  
Anne Harrison-Marchand
Keyword(s):  
Lithium Amide ◽  
Mixed Aggregates

ChemInform Abstract: Studies Aimed at Enhancement of Reactivity and Enantioselectivity of a Lithium Ester Enolate Using a Chiral Tridentate Lithium Amide.

ChemInform ◽  
2010 ◽  
Vol 31 (2) ◽  
pp. no-no
Author(s):  
Mostafa Ahmed Hussein ◽  
Akira Iida ◽  
Kiyoshi Tomioka
Keyword(s):  
Lithium Amide ◽  
Ester Enolate

Probing solvent effects on mixed aggregates associating a chiral lithium amide and n-BuLi by NMR: from structure to reactivity

2014 ◽  
Vol 43 (38) ◽  
pp. 14219-14228 ◽  
Author(s):  
Gabriella Barozzino-Consiglio ◽  
Mathieu Rouen ◽  
Hassan Oulyadi ◽  
Anne Harrison-Marchand ◽  
Jacques Maddaluno
Keyword(s):  
Solvent Effects ◽  
Test Reaction ◽  
Lithium Amide ◽  
Mixed Aggregates

NMR shows a direct correlation between the concentration of a chiral lithium amide/n-BuLi complex and ees of a test reaction.

Sur quelques réactions acide-base dans les solvants fortement basiques anhydres. II. Les amino-2 éthylamidures de sodium et de potassium

1969 ◽  
Vol 47 (19) ◽  
pp. 3509-3513 ◽  
Author(s):  
W. R. Heumann ◽  
A. Bouchard ◽  
L. Šafařík
Keyword(s):  
Hydrochloric Acid ◽  
Solid Product ◽  
Pure Nitrogen ◽  
Lithium Amide ◽  
Potassium Hydride ◽  
Basic Strength ◽  
Sodium Amide

Solutions of sodium 2-aminoethylamide in anhydrous ethylenediamine were prepared by dissolving ammoniacal sodium amide NaNH2 in ethylenediamine and removing the ammonia formed in vacuum. When these solutions were prepared and kept under nitrogen containing not more than about 5 p.p.m. of oxygen and 1 p.p.m. of moisture, they remained colorless and stable. Upon addition of benzene to these solutions, the pure amide precipitated as fine greyish–white crystals, which were also stable under pure nitrogen. The potassium 2-aminoethylamide was prepared in a similar way from ethylenediamine and potassium hydride. Its solid product resembles that of the corresponding sodium amide, but its solutions in ethylenediamine are less stable, rapidly turning dark brown because of polymerization. The basic strengths of these two 2-aminoethylamides were compared with the corresponding lithium amide by following potentiometrically the neutralization of ethylenediamine solutions of hydrochloric acid, p-methoxyphenol, water, and ethanolamine respectively. According to the heights of the potential jumps at the equivalence points the basic strength of the amides was found to increase in the order Na < Li < K.

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