Using a Combination of Magnetic Anisotropic Effects for the Configurational Assignment of Amino Alcohols
作者:Victoria Leiro、José Manuel Seco、Emilio Quiñoá、Ricardo Riguera
DOI:10.1002/asia.201000229
日期:2010.9.3
introduced on two families of terminal 1,2‐amino alcohols (prim/sec and sec/prim), determine the signs of the ΔδRS parameters—the differences in chemical shifts between the bis‐(R)‐MPA and the bis‐(S)‐MPA esters—of the hydrogen atoms placed at both sides of the stereogenic carbon atoms, thereby allowing the determination of the absolute configuration of those heterobifunctional compounds. Theoretical
引入到两个末端1,2-氨基醇家族(prim / sec和sec / prim)上的两个2-甲氧基-2-苯基乙酸(MPA)辅助部分产生的组合的磁各向异性效应决定了磁化的迹象。 δ δ RS参数-中之间的化学位移差的双- ([R)-MPA和双- (小号)-MPA酯-的放置在立体碳原子的两侧,从而允许的测定的氢原子这些杂双功能化合物的绝对构型。理论(AM1,B3LYP)和实验(CD,3 J,低温NMR光谱,同位素标记)研究以及对多种代表性化合物的测试,使人们可以建立这种方法的基础。