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. 2019 Sep 30;9(53):30952–30956. doi: 10.1039/c9ra07694h

Scope of the reactiona.

graphic file with name c9ra07694h-u2.jpg
a

Reaction conditions: 1 (1.5 mmol, 3.0 equiv.), 2 (0.50 mmol, 1.0 equiv.), Cu(OTf)2 (0.050 mmol, 10 mol%), phen (0.050 mmol, 10 mol%), DBU (1.0 mmol, 2.0 equiv.), CH3CN (5.0 mL), 35 °C, 4 h, N2; isolated yields.