作者:Guo-Jun Kang、William R. Cullen、Michael D. Fryzuk、Brian R. James、James P. Kutney
DOI:10.1039/c39880001466
日期:——
The imines ArC(Me)NCH2Ph (Ar = Ph, 2-MeO-C6H4, 4-MeO-C6H4) are hydrogenated to the corresponding secondary amines at 1000 psig H2, in 1 : 1 C6H6/MeOH, using an in situ RhI/(R)-cycphos system (cycphos = Ph2PCH(C6H11)CH2PPh2); a maximum of 91% enantiomeric excess (e.e.) is achieved at lower temperatures (–25 °C) in the presence of iodide cocatalyst.
亚胺ArC(Me)NCH 2 Ph(Ar = Ph,2-MeO-C 6 H 4,4 -MeO-C 6 H 4)在1:1 C下以1000 psig H 2氢化为相应的仲胺6 H 6 / MeOH,使用原位Rh I /(R)-环磷系统(环磷= Ph 2 PCH(C 6 H 11)CH 2 PPh 2);在碘化物助催化剂存在下,在较低的温度(–25°C)下,最多可获得91%的对映体过量(ee)。