A structurally simple l-proline derivative promotes the asymmetric allylation of aldehydes with tribromoallyltin
作者:Ling-yan Liu、Jing Sun、Nan Liu、Wei-xing Chang、Jing Li
DOI:10.1016/j.tetasy.2007.02.025
日期:2007.4
An asymmetric allylation of aldehydes with the allyltin tribromide was achieved using the l-prolinederivative as a chiral promoter in dichloromethane in the presence of a Lewis base. Various optically active homoallylic alcohols were obtained in high yields with moderate enatioselectivities of up to 62% ee.
Asymmetric Allylation of Aldehydes Catalyzed by Simple Dual Small Organic Molecules: L-Proline and L-Prolinol
作者:Guo-hong Chen、Ling-yan Liu、Xiao-ning Wei、Wei-xing Chang、Jing Li
DOI:10.1246/cl.2010.1013
日期:2010.9.5
A novel and simple methodology for the asymmetric allylation of aldehydes was reported. Double small organic molecules such as l-proline and l-prolinol were first employed for providing a chiral environment so as to afford chiral homoallylic alcohols in high yields and moderate enantioselectivities in our protocol.