Figure 4

Optimization and use of GVL as medium for the MW-assisted synthesis of benzimidazoles by Pd/C catalysed hydrogen transfer. (a) Reaction conditions: arendiamine (0.28 mmol), amine (0.36 mmol), crotonitrile (0.56 mmol), solvent (1 mL), Pd/C (0.014 mmol), MW, 170 °C.