Table 2.
Substrate scope.[a]
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The reaction was run with 0.3 mmol 1, 0.2 mmol 2, 0.6 mmol 3, Pd(OAc)2 (0.02 mmol, 10 mol%), N2 (0.3 mmol, 1.5 equiv), AsPh3 (0.05 mmol, 25 mol%), BQ (0.12 mmol, 60 mol%), Cu(OAc)2·H2O (0.1 mmol, 50 mol%), AgOAc (0.6 mmol, 3.0 equiv), and HOAc (1.0 mmol, 5.0 equiv) in 1.0 mL solvent (PhF/PhCl = 4:1) for 72 h.
15 mol% Pd(OAc)2 (0.03 mmol) was used. Bn, benzyl; PMB, p-methoxybenzyl; SEM, trimethylsilylethoxymethyl ; Ts, tosyl; NBS, N-bromosuccinimide.