Enantioselective synthesis of optically active secondary amines via asymmetric reduction
作者:Byung Tae Cho、Yu Sung Chun
DOI:10.1016/s0957-4166(00)86063-2
日期:1992.12
enantioselective synthesis of optically active secondary amines via the asymmetric reduction of N-substituted ketimines with various chiral hydride reagents, such as Itsuno's reagent (1), Corey's reagent (2), K glucoride (3), Sharpless' reagent (4), and Mosher's reagent (5) has been investigated. Among the hydride reagents examined, 1 gave the best results in terms of asymmetric induction. Thus, the reduction
通过各种手性氢化物试剂(如Isuno's试剂(1),Corey's试剂(2),葡萄糖酸K(3),Sharpless'试剂(4))通过N手性氢化物试剂的不对称还原N-取代的酮亚胺进行旋光性仲胺的对映选择性合成,已经研究了莫氏试剂(5)。在所研究的氢化物试剂中,就不对称诱导而言,1给出了最佳结果。因此,芳族酮的N-苯亚胺衍生物与还原1在具有高光学感应96-98%的收率提供相应的胺,如73%ee的对苯乙酮的N-苯亚胺(6a中),对于丙酮的N-苯亚胺(87%ee的图6B),88%ee的对bulyrophenone的N-苯亚胺(图6c),和71%ee的对异丁酰苯的N-苯亚胺(6D)。就N-烷基酮亚胺衍生物而言,与N-苯基衍生物相比,该还原所提供的光感应稍低,苯乙酮N-苄基亚胺(6f)的ee为46%,对乙酰苯醌N- n-庚基嘧啶的ee为52%。(6g)和43%ee的苯乙酮N-环己基嘧啶(6h)。然而,