Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 133, Issue 2, Pages 191-193Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja109732s
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Funding
- MEC [Proyecto CTQ2008-00042/BQU, CSD2006-003]
- Junta de Andalucia [Proyecto P07-FQM-02745]
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The reaction of 1-alkynes with acyl azides in the presence of [Tpm*Cu-,Cu-Br(NCMe)]BF4 [Tpm*(,Br) = tris(3,5-dimethyl-4-bromopyrazolyl)methane] as the catalyst provides 2,5-oxazoles in moderate to high yields. This is a novel transformation of the CuAAC type that constitutes a significant variation of the commonly observed [3 + 2] cycloaddition reaction to yield 1,2,3-triazoles.
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