An efficient method was developed for the synthesis of N-arylhexaoxazadispiroalkanes by the ring transformation of heptaoxadispiroalkanes with arylamines in the presence of lanthanide salts as catalysts.

中文翻译：

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用镧系元素催化剂合成N-芳基-六恶氮杂二螺环烷烃

在镧系元素盐的存在下，开发了一种通过芳基胺与庚二氧杂二螺环烷烃进行环转化来合成N-芳基六恶氮杂二螺环烷烃的有效方法。