Highly enantioselective Michael addition of cyclopentanone with chalcones via novel di-iminium mechanism
作者:Junfeng Wang、Xin Wang、Zemei Ge、Tieming Cheng、Runtao Li
DOI:10.1039/b915852a
日期:——
The highly efficient asymmetric Michael addition reactions of cyclopentanone with chalcones were catalyzed by a simple and commercially available chiral 1,2-diaminocyclohexane-hexanedioic acid, and exhibited good yields (up to 92%) and excellent enantioselectivities (up to 99% ee). A new di-iminium mechanism for the reaction was proposed.
高效的不对称迈克尔加成反应中,环戊酮与香豆素在一种简单且可商购的手性1,2-二氨基环己烷-己二酸的催化下进行,表现出良好的产率(最高可达92%)和优异的对映选择性(最高可达99% ee)。提出了一种新的双阳离子机制用于该反应。