SYNTHESIS AND CONFORMATIONAL PROPERTIES OF DIIMIDAZOLO[32]METACYCLOPHANE AND HOMOLOGS

摘要: Diimidazolo[32]metacyclophane (5a), a novel [32]metacyclophanediene (4) derivative, was synthesized by the ring transformation of oxazole rings dioxazolo[32]metacyclophane (1a) to imidazole rings. On basis proton unclear magnetic resonance (1H-NMR) spectroscopy, preferred conformation 5a in solution at room temperature could be assigned as syn from.