Mn(I)-Catalyzed Preferential Electrophilic C3-Maleimidation in Quinoxaline Leading to Spirocyclization and Dehydrogenation of Succinimides.
Organic letters(2023)
摘要
A Mn(I)-catalyzed site-selective nondirected C3-maleimidation of quinoxaline is established. Herein, the electrophilic C3-metalation precedes over the -directed strategy to access diversely substituted quinoxaline-appended succinimides. The products undergo PIFA-promoted C(sp)-C(sp) spirocyclization via π-electrons drifting from aryls and Selectfluor-mediated dehydrogenation of succinimide at room temperature.
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关键词
spirocyclization,quinoxaline
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