期刊
SYNLETT
卷 32, 期 8, 页码 838-844出版社
GEORG THIEME VERLAG KG
DOI: 10.1055/a-1335-7330
关键词
5-hydroxymethylfurfural; direct arylation; oxazole; bio-based; platform chemical
资金
- CNPq
- CAPES through a PrInt scholarship
5-Hydroxymethylfurfural (5-HMF) is a renewable platform chemical used for obtaining various fine chemicals. This letter reports the synthesis of 5-HMF-based oxazole compounds, with a developed palladium-catalyzed procedure used to overcome challenges in preparing derivatives containing electron-withdrawing substituents.
5-Hydroxymethylfurfural (5-HMF) is a renewable platform chemical used as a source for obtaining diverse fine chemicals. In this letter, we report the synthesis of 5-HMF-based oxazole compounds. While 5-HMF could be easily converted into the oxazole derivative through the Van Leusen reaction, the direct arylation step needed to access the final compounds was problematic at first. After optimization, a palladium-catalyzed procedure has been developed and used for the synthesis of a series of 33 derivatives. This article reports an extension of the late-stage CH arylation reaction as an application to the oxazole platform derived from biosourced 5-HMF. The challenges in the preparation of the derivatives containing some electron-withdrawing substituents were overcome by the use of a palladium-free method.
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