Table 2.
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[a] Reaction conditions: alkyne (0.1 mmol), alkyl carboxylic acid (0.3 mmol), Pc4 (0.001 mmol), NiCl2⋅dme (0.01 mmol), Cs2CO3 (0.1 mmol) in DMF (2.5 mL) and CH3CN (2.5 mL) at room temperature under irradiation with a 34 W blue LED for 48 h. The values in parenthesis represent the Z/E‐ratio of the product determined by 1H NMR analysis. [b] The reaction was performed on a 2.0 mmol scale.