Transition-Metal-Free and Chemoselective NaO<sup><i>t</i></sup>Bu–O<sub>2</sub>-Mediated Oxidative Cleavage Reactions of <i>vic</i>-1,2-Diols to Carboxylic Acids and Mechanistic Insight into the Reaction Pathways
作者:Sun Min Kim、Dong Wan Kim、Jung Woon Yang
DOI:10.1021/ol501012f
日期:2014.6.6
method for efficient oxidativecleavage of vic-1,2-diols using a NaOtBu–O2 system resulted in the formation of carboxylic acids in high yields. The present protocol is an eco-friendly alternative to a conventional transition-metal-based method. This new strategy allows large-scale production with nonchromatographic purification while also suppressing competitive reactionpathway such as benzilic acid
一种使用NaO t Bu–O 2系统对vic -1,2-二醇进行有效氧化裂解的方法,可高产率地形成羧酸。本协议是传统的基于过渡金属的方法的环保替代。这种新策略可以通过非色谱纯化进行大规模生产,同时还可以抑制竞争性反应途径,例如苯甲酸重排。
Heterogeneous carbon nitride photocatalyst for C–C bond oxidative cleavage of vicinal diols in aerobic micellar medium
作者:Tengfei Niu、Shengjun Chen、Mei Hong、Tianhao Zhang、Jiayang Chen、Xinyu Dong、Bangqing Ni
DOI:10.1039/d0gc01727b
日期:——
A green and efficient visible-light promoted aerobic oxidative C–C bond cleavage of vicinal diols in micellarmedium has been developed. This protocol used graphitic carbon nitride with nitrogen vacancies (CN620) as a metal-free recyclable photocatalyst and CTAB as surfactant in water. Control experiments and the ESR results indicated that superoxide radicals and valence band holes played an important
Direct synthesis of N-heterocycles via the acceptorless dehydrogenative coupling is very challenging and scarcely reported under 3d transition-metal catalysis. Here, we have developed an efficient Mn(I)-catalyzed sustainable synthesis of various quinoxalines from 1,2-diaminobenzenes and 1,2-diols via the acceptorless dehydrogenative coupling reaction. Further, this strategy was successfully applied
NaBrO3/bmim[HSO4]: a versatile system for the selective oxidation of 1,2-diols, α-hydroxyketones, and alcohols
作者:Jitender M. Khurana、Anshika Lumb、Ankita Chaudhary
DOI:10.1007/s00706-016-1749-z
日期:2017.2
found to be an excellent oxidizing agent in aqueousmedium. NaBrO3:bmim[HSO4] oxidized 1,2-diols, α-hydroxyketones, and alcohols to the corresponding carbonylcompounds in excellent yields. This method offers advantages such as low cost reagents, aqueousreaction conditions, moderate temperatures and short reaction times and hence environmentally benign reaction. Moreover, the ionic liquid bmim[HSO4] could
Lanthanum Triflate–Catalyzed Rapid Oxidation of Secondary Alcohols Using Hydrogen Peroxide Urea Adduct (UHP) in Ionic Liquid
作者:Pooja Saluja、Devanshi Magoo、Jitender M. Khurana
DOI:10.1080/00397911.2013.831904
日期:2014.3.19
Abstract A convenient and efficient protocol for the oxidation of secondary hydroxyl group to ketone using hydrogen peroxide–urea adduct and catalytic (CF3SO3)3La in ionic liquid has been developed. A number of 1,2-diols, α-hydroxyketones, and other aromatic and aliphatic secondary alcohols have been successfully oxidized to the corresponding ketones using this protocol in good yields and short reaction