Singh A, Mishra N, Kumar D, Tiwari VK. Lewis-Acid-Mediated Benzotriazole Ring Cleavage (BtRC) Strategy for the Synthesis of 2-Aryl Benzoxazoles from
N-Acylbenzotriazoles.
ACS OMEGA 2017;
2:5044-5051. [PMID:
31457781 PMCID:
PMC6641914 DOI:
10.1021/acsomega.7b00965]
[Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Accepted: 08/14/2017] [Indexed: 05/15/2023]
Abstract
A Lewis-acid-mediated ring cleavage of acylbenzotriazoles (RCOBt) followed by cyclization to corresponding benzoxazoles was achieved in good to excellent yields. The reaction was found consistent with the milligram to gram scale.
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