A facile synthetic method for preparation of bicyclo[4.2.0] nitrogen heterocycles has been developed via a thermal induced intramolecular [2 + 2] cycloaddition reaction of allene-ACPs. The DFT calculations indicate that this intramolecular cycloaddition proceeds in a concerted manner and a strained small ring is essential.
通过热诱导的Allene-A
CP分子内[2 + 2]环加成反应,已经开发出一种简便的合成双环[4.2.0]
氮杂环的方法。DFT计算表明,这种分子内环加成反应是协同进行的,应变小的环是必不可少的。