Lithium makes it possible: The enantioselective Michael addition of aldehydes to nitroalkenes was catalyzed by the readily available proline lithium salt. Remarkably, the asymmetric Michael reaction was scaled up to 50 mmol with 23:1 d.r. and 90 % ee.
锂使之成为可能:醛的对映选择性迈克尔加成到硝基烯烃是由容易获得的脯
氨酸
锂盐催化的。值得注意的是,不对称迈克尔反应在dr为23:1和ee为90%的情况下放大至50 mmol 。