Enhanced Reactivity of Aerobic Diimide Olefin Hydrogenation with Arylboronic Compounds: An Efficient One-Pot Reduction/Oxidation Protocol
作者:Surojit Santra、Joyram Guin
DOI:10.1002/ejoc.201501222
日期:2015.11
The process is based on the utilization of a readily available Lewis acidic arylboron compound, which evades common problems associated with the catalyst-free aerobic hydrogenation of olefins with diimide. Using an operationally simple procedure, the protocol smoothly delivers phenol derivatives and various alkanes in excellent yields with remarkable functional group compatibility. The method allows
提出了一种无催化剂且有效的方法,用于同时将烯烃氢化和芳基硼酸酯氧化为具有水合肼和分子氧的酚类。该工艺基于利用容易获得的路易斯酸性芳基硼化合物,避免了与烯烃与二酰亚胺的无催化剂有氧氢化相关的常见问题。使用操作简单的程序,该协议以优异的收率顺利提供苯酚衍生物和各种烷烃,并具有显着的官能团兼容性。该方法允许将反应放大至 1 g 起始材料。
Rearrangement and Fragmentation of Estrogen Ether Ions: New Aspects Found with Fourier Transform Ion Cyclotron Resonance Mass Spectrometry
作者:Christoph Freudenhammer、Jürgen Grotemeyer
DOI:10.1255/ejms.1071
日期:2010.8
leading to the loss of water molecules from the protonatedmolecularion have been rationalized by using protecting groups as well as mass spectrometric means such as collision-induced dissociation and infrared multi-photon dissociation. The unexpected observation of a simultaneous loss of two water molecules from the protonated estradiol ethers and of three water molecules from the protonated estriol ethers