One-Pot Two-Step Synthesis of 2-Aryl benzimidazole
N-oxides Using Microwave Heating as a Tool.
Molecules 2019;
24:molecules24203639. [PMID:
31600970 PMCID:
PMC6832536 DOI:
10.3390/molecules24203639]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 10/04/2019] [Accepted: 10/08/2019] [Indexed: 11/17/2022] Open
Abstract
A methodology is reported for the preparation of 2-aryl-benzimidazole-3-oxide derivatives. By means of a one-pot two-step protocol, a library of 42 new compounds has been prepared. Reactions were performed in a total time of 40 min using microwave heating as a tool. A streamlined work-up process was also developed, allowing for facile isolation of the products. The methodology offers a more sustainable approach than previous routes, with only water and ethanol being used as solvents, and the products being isolated by means of a simple filtration without the need for any further purification.
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