Naphthyl Groups in Chiral Recognition: Structures of Salts and Esters of 2-Methoxy-2-naphthylpropanoic Acids
作者:Akio Ichikawa、Hiroshi Ono、Yuji Mikata
DOI:10.1002/asia.201200345
日期:2012.10
The crystal structures of salt 8, which was prepared from (R)‐2‐methoxy‐2‐(2‐naphthyl)propanoic acid ((R)‐MβNP acid, (R)‐2) and (R)‐1‐phenylethylamine ((R)‐PEA, (R)‐6), and salt 9, which was prepared from (R)‐2‐methoxy‐2‐(1‐naphthyl)propanoic acid ((R)‐MαNP acid, (R)‐1) and (R)‐1‐(p‐tolyl)ethylamine ((R)‐TEA, (R)‐7), were determined by X‐ray crystallography. The MβNP and MαNP anions formed ion‐pairs
盐8的晶体结构是由(R)-2-甲氧基-2-(2-萘基)丙酸((R)-MβNP酸,(R)-2)和(R)-1-苯乙胺制得的((R)-PEA,(R)-6)和盐9,它们是由(R)-2-甲氧基-2-(1-萘基)丙酸((R)-MαNP酸,(R) ‐ 1)和(R)‐1‐(对甲苯基)乙胺((R)‐TEA,(R)‐7)是通过X射线晶体学确定的。MβNP和MαNP阴离子通过甲氧基辅助的盐桥和芳香族CH⋅⋅⋅π相互作用分别与PEA和TEA阳离子形成离子对。盐桥网络在两种盐中均形成2 1列。最后,由(2 E,6 E)-法呢醛(11)与氘代(2 E,6 E)-法呢醛(11)的反应制得(S)-(2 E,6 E)-(1-2 H 1)法尼醇((S)-13)。R)-BINAL-H(即(R)-BINAL-D)。化合物(S)-13的对映体过量通过(S)-MαNP酯14的NMR分析确定。还阐明了由伯醇制备的MαNP酯的溶液状态结构。