Abnormal bis-NHC mediated aerial oxidation of arylaldehydes: highly efficient transformation of arylaldehydes to the corresponding carboxylic acids catalyzed by organic catalysts

Abnormal bis-NHC mediated aerial oxidation of arylaldehydes: highly efficient transformation of arylaldehydes to the corresponding carboxylic acids catalyzed by organic catalysts
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异常双-NHC介导的芳醛空气氧化:有机催化剂催化芳醛高效转化为相应的羧酸

DOI:
10.1039/c3ra00046j
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发表时间:
2013-04
期刊:
影响因子:
3.9
通讯作者:
Fu, Wen-Fu
Fu, Wen-Fu
中科院分区:
化学3区
文献类型:
--
作者:
Yang, Wei;Gou, Gao-Zhang;Wang, Yi;Fu, Wen-Fu

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合成了三种含不同烷基和两个2,4,6-三甲基苯基咪唑环的双两性离子咪唑盐(bi-NHCs),并用核磁共振、电喷雾电离质谱仪(ESI-MS)和X射线衍射法对其结构进行了表征。在常压和温和的反应条件下,发现双NHC络合物催化芳醛氧化成相应的羧酸是一种简便、高效的反应,具有很好的官能团耐受性,包括卤化物、乙醚、烷基和硝基。
Three bis-zwitterionic imidazolium salts (bis-NHCs) bearing different alkyl chains and two 2,4,6-trimethylphenyl groups on their imidazole rings have been synthesized and characterized by NMR, electrospray ionization mass spectrometry (ESI-MS) and X-ray diffraction analysis. A convenient and highly efficient reaction catalyzed by the bis-NHC complexes has been discovered for the oxidation of arylaldehydes to the corresponding carboxylic acids in good yields, under ambient pressure in air and under mild reaction conditions, with excellent functional group tolerance, including halide, ether, alkyl and nitro groups.
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