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. Author manuscript; available in PMC: 2022 Jan 15.
Published in final edited form as: Org Lett. 2021 Jan 4;23(2):433–437. doi: 10.1021/acs.orglett.0c03941

Scheme 3. Substrate Scope under Catalytic Conditionsa.

Scheme 3.

aReaction conditions: 1 (0.2 mmol), 2 (0.5 mmol, 2.5 equiv), Cu(OTf)2 (0.03 mmol), dtbbpy (0.04 mmol), K2S2O8 (0.4 mmol), KCl (0.4 mmol), MeCN (1 mL), 100 °C, 20–24 h.