Figure 2

Optimization and use of GVL as medium for the MW-assisted synthesis of benzimidazoles by Pd/C catalysed hydrogen transfer. (a) Reaction conditions: 1a (0.14 mmol), AcOH (10 mol%), 0.5 mL GVL. (b) Conversion of 1a to 3a determined by GC analysis. (c) Isolated yield of the pure product. (d) Reaction performed in toluene (1 mL).