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The silver carbonate‐catalyzed direct C _sp² H phosphorylation of indoles in the presence of magnesium nitrate is described. The reaction affords selectively phosphonoindoles in moderate to good yields through a radical process. This protocol provides an efficient and general method for the preparation of 2‐ and 3‐phosphorylated indoles. magnified image
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Sun et al. (2016) studied this question.
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