Ethylammonium Nitrate (EAN)/Tf<sub>2</sub>O and EAN/TFAA: Ionic Liquid Based Systems for Aromatic Nitration
作者:Gopalakrishnan Aridoss、Kenneth K. Laali
DOI:10.1021/jo201374a
日期:2011.10.7
Acting as in situ sources of triflyl nitrate (TfONO2) and trifluoroacetyl nitrate (CF3COONO2), the EAN/Tf2O and EAN/TFAA systems, generated via metathesis in the readily available ethylammonium nitrate (EAN) ionic liquid as solvent, are powerful electrophilic nitrating reagents for a wide variety of aromatic and heteroaromatic compounds. Comparative nitration experiments indicate that EAN/Tf2O is superior
EAN / Tf 2 O和EAN / TFAA系统充当原位硝酸三氟硝酸盐(TfONO 2)和三氟乙酰硝酸盐(CF 3 COONO 2)的来源,通过易位易位的硝酸乙基铵(EAN)离子液体作为溶剂进行复分解生成。是强大的亲电硝化试剂,适用于各种芳香族和杂芳香族化合物。对比硝化实验表明,对于高度失活的系统,硝化EAN / Tf 2 O优于EAN / TFAA。在报道的共价硝酸盐和预先形成的硝鎓盐的值之间,两种系统均显示出较低的底物选择性(K T / K B = 5-10)。