Copper-catalyzed selective benzylic C-O cyclization of N-o-tolylbenzamides: synthesis of 4H-3,1-benzoxazines |
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| Authors: | Li Yan Li Zhongshu Xiong Tao Zhang Qian Zhang Xiangyang |
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| Institution: | Department of Chemistry, Northeast Normal University, 130024 Changchun, China. |
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| Abstract: | A novel Selectfluor-mediated copper-catalyzed highly selective benzylic C-O cyclization for the synthesis 4H-3,1-benzoxazines is reported. The predominant selectivity for a benzylic C(sp(3))-H over an aromatic C(sp(2))-H bond in N-o-tolylbenzamides is achieved. |
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