An Efficient Metal-Free Oxidative Esterification and Amination of Benzyl C-H Bond.
MOLECULES (BASEL, SWITZERLAND) 2020;
25:molecules25071527. [PMID:
32230851 PMCID:
PMC7180972 DOI:
10.3390/molecules25071527]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 03/17/2020] [Accepted: 03/26/2020] [Indexed: 11/16/2022]
Abstract
An esterification and amination of benzylic C-H bonds was developed by using 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) under metal- and iodide-free conditions. Both carboxylic acids and amines could be used as ideal coupling partners for the oxidative coupling reactions with various diarylmethanes. A close to equal amount of coupling reagents was enough to afford the product in good to high yields.
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