Asymmetric hydrogenation of 3-alkylidene-2-piperidones using Noyori's catalyst. Effect of N-substituents on the enantioselectivity
作者:John Y.L. Chung、Dalian Zhao、David L. Hughes、James M. McNamara、Edward J.J. Grabowski、Paul J. Reider
DOI:10.1016/0040-4039(95)01546-9
日期:1995.10
The enantioselectivity in the asymmetric hydrogenation of 3-alkylidene-2-piperidones catalyzed by BINAP-Ru(II) complex was found to be significantly effected by the internal substituents on the lactam nitrogen, affording the corresponding 3-alkyl-2-piperidones in 52–92% ee.
发现由BINAP-Ru(II)配合物催化的3-亚烷基-2-哌啶酮不对称氢化中的对映选择性受内酰胺氮上的内部取代基的影响很大,在52中得到相应的3-烷基-2-哌啶酮–92%ee。