Ionic liquid as catalyst and solvent: the remarkable effect of a basic ionic liquid, [bmIm]OH on Michael addition and alkylation of active methylene compounds
作者:Brindaban C. Ranu、Subhash Banerjee、Ranjan Jana
DOI:10.1016/j.tet.2006.10.077
日期:2007.1
ketones, carboxylic esters and nitriles. It further catalyzes the addition of thiols to α,β-acetylenic ketones and alkylation of 1,3-dicarbonyl and -dicyano compounds. The Michael addition to α,β-unsaturated ketones proceeds in the usual way, giving the monoaddition products, whereas addition to α,β-unsaturated esters and nitriles leads exclusively to the bis-addition products. The α,β-acetylenic ketones
碱性离子液体1-甲基-3-丁基咪唑鎓氢氧化物[bmIm] OH催化活性亚甲基化合物与共轭酮,羧酸酯和腈的迈克尔加成反应。它进一步催化将硫醇添加到α,β-炔基酮上,并使1,3-二羰基和-二氰基化合物烷基化。α,β-不饱和酮的迈克尔加成反应以通常的方式进行,得到单加成产物,而α,β-不饱和酯和腈的加成仅导致双加成产物。α,β-炔基酮与硫醇进行双重共轭加成,生成β-酮基1,3-二硫代衍生物。在烷基化反应中,无环的1,3-二酮被单烷基化,而环状酮在相同条件下进行二烷基化。所有这些反应均在没有任何有机溶剂的情况下进行。