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Scope of C2‐substituted thiophenes. All reactions were conducted on a 0.2 mmol scale. [a] Pd(OAc)2 (10 mol %), L8 (20 mol %), pyrazine (20 mol %), Ag2O (2 equiv), MeOH (2 mL), 2 a (5 equiv), 30 °C, 18 h. [b] Reaction conducted at 50 °C instead of 30 °C.
