Counterion Control of t-BuO-Mediated Single Electron Transfer to Nitrostilbenes to Construct N-Hydroxyindoles or Oxindoles.

Counterion Control of t-BuO-Mediated Single Electron Transfer to Nitrostilbenes to Construct N-Hydroxyindoles or Oxindoles.
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DOI:
10.1002/anie.202104319
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发表时间:
2021-08-23
期刊:
Angewandte Chemie (International ed. in English)
影响因子:
--
通讯作者:
Driver TG
Driver TG
中科院分区:
其他
文献类型:
--
作者:
Zhao Y;Zhu H;Sung S;Wink DJ;Zadrozny JM;Driver TG

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tert-Butoxide unlocks new reactivity patterns embedded in nitroarenes. Exposure of nitrostilbenes to sodium tert-butoxide was found to produce N-hydroxyindoles at room temperature without an additive. Changing the counterion to potassium changed the reaction outcome to yield solely oxindoles through an unprecedented dioxygen-transfer reaction followed by a 1,2-phenyl migration. Mechanistic experiments established that these reactions proceed via radical intermediates and suggest that counterion coordination controls whether an oxindole or N-hydroxyindole product is formed. tert-Butoxide unlocks divergent reactivity embedded in nitrostilbenes to construct N-hydroxyindoles or oxindoles depending on whether sodium or potassium is the counterion.
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