Consecutive Betti/Bargellini multicomponent reactions: an efficient strategy for the synthesis of naphtho[1,2-f][1,4]oxazepine scaffolds
2021
An efficient and convenient approach has been developed for the synthesis of naphtho[1,2-f][1,4]oxazepine structures based on the consecutive Betti/Bargellini multicomponent reactions. Aminobenzylnaphthols were prepared from 2-naphthol, aromatic aldehydes, and 2-aminopyridine via the Betti reaction, and then, naphtho[1,2-f][1,4]oxazepine derivatives were synthesized using the Betti reaction products, chloroform, and aliphatic ketones in the presence of sodium hydroxide via Bargellini multicomponent reactions. A significant aspect of this work is the construction of novel oxazepine-based scaffolds with potential pharmaceutical interest from cheap and readily available starting materials in moderate yields.
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