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. Author manuscript; available in PMC: 2020 Feb 25.
Published in final edited form as: Angew Chem Int Ed Engl. 2019 Jan 25;58(9):2864–2869. doi: 10.1002/anie.201813919

Scheme 1.

Scheme 1.

Synthesis and reactivity of “off-cycle” phenylthiophosphetanium salt [SPh]+. Reaction conditions: (a) indole (1, 1.0 equiv), dioxane, rt; (b) indole (1, 1.0 equiv), PhSiH3 (2.0 equiv), dioxane, rt; (c) indole (1, 1.0 equiv), PhSiH3 (2.0 equiv), PhSO2Cl (1.8 equiv), dioxane, rt.