Metal-triflate ionic liquid systems immobilized onto mesoporous MS41 materials as new and efficient catalysts for N-acylation
作者:S COMAN、M FLOREA、V PARVULESCU、V DAVID、A MEDVEDOVICI、D DEVOS、P JACOBS、G PONCELET、P GRANGE
DOI:10.1016/j.jcat.2007.04.022
日期:2007.7.25
N-sorption measurements, TG–DTA, DRIFT, XPS, TEM, and ICP-AES. The catalysts were tested in acylation of amines and sulfonamides and proved highly active and selective. For both aromatic and aliphatic amines, acylation with carboxylic acids was possible. For sulfonamides, acylation was possible only with anhydrides. Recycling the catalysts was not accompanied by any leaching of ILs or metal triflate.
采用接枝法制备了两种基于二氢咪唑鎓和吡啶鎓阳离子的固定MS41离子液体(IL)。三氟甲磺酸盐在这些材料上的第二次固定导致金属-三氟甲磺酸盐复合物固定到离子液体中。由此获得的材料通过 1H NMR、XRD、N-吸附测量、TG-DTA、DRIFT、XPS、TEM 和 ICP-AES 进行表征。该催化剂在胺和磺酰胺的酰化反应中进行了测试,证明具有高活性和选择性。对于芳香胺和脂肪胺,都可以用羧酸进行酰化。对于磺酰胺类药物,只能用酸酐进行酰化。催化剂的回收不伴随离子液体或金属三氟甲磺酸盐的任何浸出。