A novel simple version for highly regioselective or regiospecific substitution method of aromatic isoquinoline has been developed by utilizing the reaction condition of Bischler-Napieralski cyclization. The proposed reaction mechanism was successfully indirect confirmed. In this method, chloroiminium intermedium A was formed from the amide compound with phosphoryl chloride, and intramolecular cyclized was preceded. The final structure of aromatic isoquinoline was obtained through removing the acidic hydrogen atom by sodium borohydride served as a base rather than reductive agent as expected.
开发了一种新的简单方法,用于高度区域选择性或区域专一性的芳香异�唑啉取代反应,该方法利用了Bischler-Napieralski环化反应的条件。所提出的反应机理成功地得到了间接证实。在此方法中,
氯亚胺离子中间体A由酰胺化合物与
磷酰
氯形成,随后进行分子内环化。最终的芳香异唑啉结构是通过以
硼氢化钠作为碱而不是预期的还原剂来去除酸性氢原子而得到的。