Alternative intermediates for glycerol valorization: iridium-catalyzed formation of acetals and ketals
作者:Corrado Crotti、Erica Farnetti、Nicol Guidolin
DOI:10.1039/c0gc00096e
日期:——
The organoiridium derivatives [Cp*IrCl2]2 (Cp* = pentamethylcyclopentadienyl) and [Cp*Ir(Bu2-NHC)Cl2], (Bu2-NHC = 1,3-di-n-butylimidazolylidene) catalyzed glycerol acetalization with several ketones and aldehydes, as well as transacetalization. All the catalytic reactions produced the five-membered cyclic ketals, i.e. the 1,3-dioxolanes, as main products, with selectivities of 94–100% for ketals, and up to 83% for acetals.
有机铱衍生物[Cp*IrCl2]2(Cp* = 五甲基环戊二烯基)和[Cp*Ir(Bu2-NHC)Cl2](Bu2-NHC = 1,3-二正丁基咪唑啉亚基)催化甘油与多种酮和醛的缩醛化反应以及转缩醛化反应。所有催化反应均主要生成五元环缩酮,即1,3-二氧戊环,缩酮选择性为94-100%,缩醛选择性高达83%。