Synthesis of Symmetrical Organic Carbonates via Significantly Enhanced Alkylation of Metal Carbonates with Alkyl Halides/Sulfonates in Ionic Liquid
作者:Yogesh R. Jorapur、Dae Yoon Chi
DOI:10.1021/jo051722h
日期:2005.12.1
We report a new phosgene-free method for the synthesis of symmetrical organic carbonates via alkylation of metal carbonate with various alkyl halides and sulfonates in 1-n-butyl-3-methylimidazolium hexafluorophosphate, [bmim][PF6], as an ecofriendly reaction media. Alkylation of metal carbonate in various ionicliquids with 1-bromo-3-phenylpropane (1a) as a model reactant has thoroughly been investigated
Preparation of alkyl fluorides and carbonates via divergent dehydroxyfluorination and carbonation of alcohols with trifluoromethyl trifluoromethanesulfonate (CF3SO2OCF3) is described. The reactions performed with BTMG in THF provided alkyl fluorides in good yields, whereas those of two different alcohols with Et3N in DCM formed asymmetric carbonates in moderate to excellent yields. CF3SO2OCF3 was demonstrated
描述了通过使用三氟甲磺酸三氟甲酯 (CF 3 SO 2 OCF 3 )对醇进行不同的脱羟基氟化和碳酸化来制备烷基氟化物和碳酸酯。在 THF 中使用 BTMG 进行的反应以良好的收率提供烷基氟化物,而在 DCM 中使用 Et 3 N 的两种不同醇的反应以中等到极好的收率形成不对称碳酸酯。CF 3 SO 2 OCF 3通过改变碱基,在反应中被证明是“F”或“CO”试剂,允许从相应的醇中高效地选择性构建烷基氟化物和碳酸酯。值得注意的是,该方法综合制备了其他方法难以合成的含氟不对称碳酸酯,在学术和工业领域都具有巨大的应用潜力。