Fig. 3: Scope of benzimidazoles and analogs.
From: Ni-catalyzed hydroarylation of alkynes with unactivated β-C(sp2)−H bonds
Reaction conditions: 1 (0.4 mmol), 2a (0.8 mmol), AlEt3 (1 mol/L in hexane, 0.16 mmol), toluene (0.8 mL) under N2 for 12 h. Yield of isolated products. *100 °C, AlMe3 (1 mol/L in hexane, 0.32 mmol). †PO-3 was replaced by bulkier PO-6 (see the structure in the SI). ‡30 °C. §mono refers to C5-alkenylated product and di refers to C5 and C8-dialkenylated product. nPr = n-propyl.
