作者:Alexander G. Zavozin、Natalya E. Kravchenko、Nikolay V. Ignat’ev、Sergei G. Zlotin
DOI:10.1016/j.tetlet.2009.11.097
日期:2010.1
The reaction of levulinic acid and its esters with bromine in ionic liquids results in the formation of 3-bromo derivatives as the major products and not the 5-bromo substituted isomers, which are typically formed in organic solvents. The bromination of levulinic acid in ionic liquids in the presence of urea leads to the formation of 5-bromolevulinic acid.
乙酰丙酸及其酯与溴在离子液体中的反应导致形成3-溴衍生物作为主要产物,而不是5-溴取代的异构体,后者通常在有机溶剂中形成。在尿素存在下离子液体中乙酰丙酸的溴化导致5-溴乙酰丙酸的形成。