Highly diastereoselective Henry reaction of nitro compounds with chiral derivatives of glyoxylic acid
作者:Iwona Kudyba、Jerzy Raczko、Zofia Urbańczyk-Lipkowska、Janusz Jurczak
DOI:10.1016/j.tet.2004.04.005
日期:2004.5
N-Glyoxyloyl-(2R)-bornane-10,2-sultam and (1R)-8-phenylmenthyl glyoxylate react stereoselectively with simple nitro compounds giving diastereoisomeric nitroalcohols with high asymmetric induction. N-Glyoxyloyl-(2R)-bornane-10,2-sultam 1a is shown to be a highly efficient chiral inducer, superior to (1R)-8-phenylmenthyl glyoxylate 1b. In all cases, the absolute (2S) configuration at the center bearing
N-乙二酰-(2 R)-冰片烷10,2-磺酰胺和(1 R)-8-苯薄荷基乙醛酸酯与简单的硝基化合物发生立体选择反应,得到具有高不对称诱导作用的非对映异构体硝基醇。N-乙醛酰-(2 R)-冰片烷10,2-磺胺1a被证明是一种高效的手性诱导剂,优于(1 R)-8-苯基薄荷基乙醛酸酯1b。在所有情况下,确定了带有羟基的中心的绝对(2 S)构型和主要非对映异构体的相对syn构型。