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|Title:||Diastereoselectivity in the boron aldol reaction of α-alkoxy and α,β-bis-alkoxy methyl ketones|
|Author:||Fernandes, Alessandra A. G.|
Leonarczyk, Ives A.
Ferreira, Marco A. B.
Dias, Luiz Carlos
|Abstract:||In this work, using DFT calculations, we investigated the 1,4 and 1,5 asymmetric induction in boron enolate aldol reactions of α-alkoxy and α,β-bisalkoxy methyl ketones. We evaluated the steric influence of alkyl substituents at the α position and the stereoelectronic influence of the oxygen protecting groups at the α and β positions. Theoretical calculations revealed the origins of the 1,4 asymmetric induction in terms of the nature of the β-substituent. The synergistic effect between the α,β-syn and α,β-anti-bisalkoxy stereocenters was elucidated. In the presence of the β-alkoxy center, the reaction proceeds through the Goodman–Paton 1,5-stereoinduction model, experiencing a minor influence of the α-alkoxy center|
|Editor:||Royal Society of Chemistry|
|Appears in Collections:||IQ - Artigos e Outros Documentos|
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