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Stereoselective reactions. 28. Effects of the alkyl group at the amide nitrogen of chiral bidentate lithium amides on enantioselective deprotonation reaction

✍ Scribed by Kazumasa Aoki; Kiyoshi Tomioka; Hiroshi Noguchi; Kenji Koga


Book ID
108378750
Publisher
Elsevier Science
Year
1997
Tongue
French
Weight
940 KB
Volume
53
Category
Article
ISSN
0040-4020

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6Li-and 15N-NMR spectroscopic analyses of a labeled chiral bidentate lithium amide ([6Li, 15N2]-(R)-I) have shown that it exists as a chelated monomer (5) in THF and in DME, as a chelated dimer (6) in toluene and in ether, while as a chelated monomer (5) in any of these solvents in the presence of 2