Proline-Catalyzed Asymmetric Synthesis of syn- and anti-1,3-Diamines
摘要:
A general organocatalytic strategy for asymmetric synthesis of both syn/anti-1,3-diamines has been developed. The strategy employs proline-catalyzed sequential alpha-amination and Horner-Wadsworth-Emmons (HWE) olefination of aldehydes as the key step where syn-1,3-diamine was obtained as the most favorable product.
Proline-Catalyzed Asymmetric Synthesis of syn- and anti-1,3-Diamines
摘要:
A general organocatalytic strategy for asymmetric synthesis of both syn/anti-1,3-diamines has been developed. The strategy employs proline-catalyzed sequential alpha-amination and Horner-Wadsworth-Emmons (HWE) olefination of aldehydes as the key step where syn-1,3-diamine was obtained as the most favorable product.
γ-Amino Alcohols via Organocascade Reactions Involving Dienamine Catalysis
作者:Chandrakumar Appayee、Americo J. Fraboni、Stacey E. Brenner-Moyer
DOI:10.1021/jo3017007
日期:2012.10.5
Enantioenriched β-functionalized-γ-amino alcohols were produced from simple achiral enals in one flask by combining dienamine- and iminium-catalyzed intermolecular reactions. Reaction products are precursors of γ-amino acids, γ-lactams, and pyrrolidines; one was employed in a synthesis of γ-amino acid (S)-vigabatrin, the bioactive enantiomer of Sabril.