10:9-borazarophenanthrenes have been prepared by reaction of the 10-lithio derivatives with ethyl chloroformate. Unlike the parent compounds they are rapidly oxidized by air to products in which the BN bond is broken. These reactions suggest that the stability of the present compounds to oxidation and hydrolysis must be due to resonance stabilization. A measurement of the dipole moment of 10-methyl-10:9-borazarophenanthrene
通过使10-
硫代衍
生物与
氯甲酸乙酯反应,制备了10:9-
硼氮杂
菲的10-乙氧羰基衍
生物。与母体化合物不同,它们被空气迅速氧化为BN键断裂的产物。这些反应表明,本发明化合物对氧化和
水解的稳定性必须归因于共振稳定作用。据报道,R。Huisgen教授及其合作者对10-甲基-10:9-
硼氮杂
菲的偶极矩进行了测量。