Achiral and chiral imidazoliophanes were prepared by N-alkylation of chiral imidazole derivatives featuring an α-amino acid motif and subsequent double quarternization of the imidazole N3-position of the corresponding precyclophanes. Eight new optically pure imidazoliophanes were synthesized in good yields, whereas the molecular structure of one achiral analogue was confirmed by X-ray analysis.
通过N-烷基化具有
α-氨基酸基团的手性
咪唑衍
生物,随后对相应的预环烯烃的
咪唑N3位点进行双季
铵化,合成了非手性和手性
咪唑烯烃。合成了八种新的光学纯
咪唑烯烃,产率良好,此外,利用X射线分析确认了一种非手性类似物的分子结构。