Enantiomerically pure chiral phenazino-crown ethers: synthesis, preliminary circular dichroism spectroscopic studies and complexes with the enantiomers of 1-arethyl ammonium salts
作者:Erika Samu、Péter Huszthy、László Somogyi、Miklós Hollósi
DOI:10.1016/s0957-4166(99)00287-6
日期:1999.7
Enantiomerically pure chiral crown ethers containing the phenazine unit [(R,R)-2–(S,S)-8] were prepared by two types of cyclization reactions. Ligands (R,R)-2, (R,R)-3, (S,S)-4, (R,R)-5, (R,R)-6 and (R,R)-7 were prepared from phenazine-1,9-diol 9 and the appropriate ditosylates (S,S)-10–(S,S)-15 in weak basic conditions with complete inversion of configuration. Ligands (S,S)-2, (S,S)-7 and (S,S)-8
通过两种环化反应制备了含有吩嗪单元[(R,R)-2-(S,S)-8 ]的对映体纯手性冠醚。配体(R,R) - 2,(R,R) - 3,(S,S) - 4,(R,R) - 5,(R,R) - 6和(R,R) - 7制备由吩嗪-1,9-二醇9和适当的二甲苯磺酸盐(S,S)-10 –(S,S)-15在弱的基本条件下,完全颠倒了配置。然而,配体(S,S)-2,(S,S)-7和(S,S)-8是由1,9-二氯吩嗪19和适当的二醇(S,S)-16-(S ,S)-18在牢固的基本条件下保持配置。已经通过CD光谱研究了α-(1-萘基)乙基高氯酸铵(NEA)和α-苯基乙基高氯酸铵(PEA)对大多数手性配体的对映体识别。