A facile enantioselective 1,4-addition of TMSCN to aromatic enones has been developed using chiral sodium phosphate. Thus, in the presence of 20 mol% of sodium salt generated in situ from (R)-3,3′-di(1-adamantyl)-1,1′-binaphthyl-2,2′-diylphosphoric acid and NaOH, β-cyano ketones were obtained in high yield (86-96%) and up to 72% ee within three hours at 80 ËC in toluene.
已经开发了一种方便的手性选择性1,4-加成,将TMSCN添加到
芳香酮中,使用了手性
磷酸钠。因此,在存在20摩尔%的钠盐(由(R)-3,3′-二(1-阿丹达烯基)-1,1′-联
萘-2,2′-二基
磷酸和
氢氧化钠现场生成)下,获得了高产率(86-96%)和高达72%对映选择性(ee)的β-
氰基酮,在80°C的
甲苯中反应三小时。