Access to Different Isomeric Dibenzoxazepinones through Copper-Catalyzed C-H Etherification and C-N Bond Construction with Controllable Smiles Rearrangement.
Yunfei Zhou, Jianming Zhu, Bo Li, Yong Zhang, Jia Feng, Adrian Hall, Jiye Shi, Weiliang Zhu
Index: Org. Lett. 18(3) , 380-3, (2016)
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Abstract
An efficient new way to access two regio-isomeric dibenzoxazepinones is reported from 8-aminoquinoline benzamides and 2-bromophenols. Through choice of conditions, the reaction proceeds either through a sequential C-H etherification and subsequent Goldberg reaction, both controlled by the aminoquinoline group and Cu(I), or via a C-H etherification and subsequent Smiles rearrangement promoted by Cu(II) and t-BuOK. The 8-aminoquinoline moiety, e.g., 8-amino-5-methoxyquinoline, is readily removable from the structures of dibenzoxazepinones under moderate conditions.
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