Synthesis of photochromic spirooxazines from 1-amino-2-naphthols

Add time:07/16/2019    Source:sciencedirect.com

A synthetic access to photochromic spirooxazines is developed through the condensation of methylene-substituted azaheterocycles on 1-amino-2-naphthols in presence of an oxidizing agent. Compared to usual preparation of this kind of compounds (via 1-nitroso-2-naphthols), yields are generally good and approaches to further spiroheterocyclic oxazines are possible.

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