报道了用于烷基叠氮化物合成的脂肪族羧酸的催化脱羧氮化。通过使用K 2 S 2 O 8作为氧化剂和PhSO 2 N 3作为氮源,由易于获得的脂肪族羧酸制备出一系列的叔,仲和伯有机叠氮化物。EPR实验充分证明在该过程中产生了烷基自由基过程,DFT计算进一步支持SET过程,然后逐步进行S H 2反应以提供叠氮化物产物。
FeCl3/NaI has been employed for an efficientreduction of a variety of azides. This method is selective in the presence of a nitro functionality and has been extended for the synthesis of fused [2,1-b]quinazolinone ring systems such as deoxyvasicinone.
FeCl 3 / NaI已用于有效还原各种叠氮化物。该方法在硝基官能团存在的情况下是选择性的,并且已经扩展为合成稠合的[ 2,1- b ]喹唑啉酮环系统,例如脱氧维辛酮。
Radical Reduction of Aromatic Azides to Amines with Triethylsilane
Aromaticazides are inert toward triethylsilane under thermal conditions in the presence of a radical initiator, but in the presence of additional catalytic amounts of tert-dodecanethiol, they afford anilinosilanes and thence the corresponding anilines in virtually quantitative yields.
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。
Synthesis and Antimicrobial Activity of 4-Substituted 1,2,3-Triazole-Coumarin Derivatives
A new series of coumarin-1,2,3-triazole conjugates with varied alkyl, phenyl and heterocycle moieties at C-4 of the triazole nucleus were synthesized using a copper(I)-catalysed Huisgen 1,3-dipolar cycloaddition reaction of corresponding O-propargylated coumarin (3) or N-propargylated coumarin (6) with alkyl or aryl azides. Based on their minimal inhibitory concentrations (MICs) against selected microorganisms
New Glucocerebrosidase Inhibitors by Exploration of Chemical Diversity of <i>N</i>-Substituted Aminocyclitols Using Click Chemistry and in Situ Screening
the reaction can be carried out in an aqueous system, the resulting library members can be screened in situ with minimal manipulation. From the preliminary GCase inhibition data, the most potent library members have been individually resynthesized for further biological screening and complete characterization. Some of the library members have shown biochemical data (IC50, Ki, and stabilization ratio)