Chiral 1,3-aminosquaramides derived from cis-2-benzamidocyclohexanecarboxylic acid as organocatalysts for asymmetric Michael addition reactions
作者:Koichi Kodama、Kazuhisa Maruyama、Takuji Hirose
DOI:10.1016/j.tet.2022.132750
日期:2022.4
Herein, chiral 1,3-aminosquaramides derivedfrom cis-2-benzamidocyclohexanecarboxylic acid, which is a chiral β-amino acid derivative, were synthesized and applied as bifunctional organocatalysts for asymmetric Michael addition reaction of 1,3-dicarbonyl compounds to β-nitrostyrenes. The catalyst structure and reaction conditions, such as solvent and temperature, were examined, and then, the optimized