Microwave mediated hydrogen deuterium exchange: a rapid synthesis of 2H-substituted benzimidazole

Deuterium aromatic substituted compounds were prepared by microwave irradiation of the parent unlabeled compounds in the presence of deuterium oxide and deuterium chloride. The percentage of deuterium incorporation was investigated under various reaction conditions. A rapid synthesis of 2H-substituted benzimidazole under microwave irradiation is described.