Rapid Oxidation of 1,2-Diols,<i>α</i>-Hydroxyketones and Some Alcohols using<i>N</i>-Bromosuccinimide in Ionic Liquid
作者:Jitender M. Khurana、Ankita Chaudhary、Sanjay Kumar
DOI:10.1080/00304948.2013.786585
日期:2013.5.4
Oxidation of 1,2-diols, α-hydroxyketones and alcohols to carbonyl compounds is of great importance in organic synthesis1 and can be achieved with an array of reagents such as chromium(VI)-based reagents,2 hypervalent iodine reagents,3 and DABCO/Br2, DMSO/N2H4.H2O/I2/H2O/CH3CN. The oxidation of α-hydroxyketones to 1,2-diketones has also been reported by a variety of reagents including pyridinium chlorochromate
将 1,2-二醇、α-羟基酮和醇氧化成羰基化合物在有机合成中非常重要 1,并且可以通过一系列试剂实现,例如基于铬 (VI) 的试剂、2 高价碘试剂、3 和 DABCO /Br2、DMSO/N2H4.H2O/I2/H2O/CH3CN。α-羟基酮氧化为 1,2-二酮也有报道,包括氯铬酸吡啶鎓、6 氯铬酸铵、7 碘、8 Fe(NO3)2.9H2O 和 Fe(NO3)3/4-OH-速度。已使用 4-MeO-TEMPO,11 (4AcNH-TEMPO)-OTs-TsOH、12 CrO3-NH4Cl、NBS-CCl4-Py、NBS-Al2O3 将 1,2-二醇转化为 1,2-二酮。NBS/2,6-二甲基吡啶在四氟硼酸 1-丁基-3-甲基咪唑鎓 ([bmim]BF4) 中也报道了醇的氧化。该方法涉及使用化学计量量的碱并且具有窄的底物通用性并且仅限于苯甲醇。离子液体已成为传统溶剂的有效替代品,因为它们具有