A highly efficient synthesis of novel spirocyclic benzoxazine‐indenes from benzoxazine and alkynes via imine directed C–H activation/annulation using rhodium catalyst was reported. The methodology could be applied to various benzoxazines and alkynes, giving the corresponding spiro indenyl benzoxazine as spirocycle products in good yields.

中文翻译：

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铑催化的3-芳基-2H-苯并[b] [1,4]恶嗪和炔烃的C-H活化/环化反应合成螺型茚基苄恶嗪

据报道，通过铑催化的亚胺定向的CH活化/环化反应，由苯并恶嗪和炔烃高效合成了新型螺环苯并恶嗪-茚。该方法可以应用于各种苯并恶嗪和炔烃，以高收率得到相应的螺-茚基苯并恶嗪作为螺环产物。