Efficient Preparation of Isothiocyanates From Dithiocarbamates Using Bromineless Brominating Reagent
作者:Ramesh Yella、Harisadhan Ghosh、Siva Murru、Santosh K. Sahoo、Bhisma K. Patel
DOI:10.1080/00397910903219476
日期:2010.6.25
determined. Utilizing this thiophilic bromineless brominating agent EDPBT, highly useful synthetic intermediates (alkyl and aryl isothiocyanates) have been achieved directly from dithiocarbamates. EDPBT can be easily prepared from readily available reagents. It has been used as a thiophilic reagent, and its thiophilicity dominates over its brominating ability for substrates amenable to bromination. This
首次确定了双溴化物试剂 1,1'-(乙烷-1,2-二基)二吡啶鎓双溴化物 (EDPBT) 的晶体结构。利用这种亲硫性无溴溴化剂 EDPBT,可以直接从二硫代氨基甲酸酯获得非常有用的合成中间体(异硫氰酸烷基酯和芳基酯)。EDPBT 可以很容易地用现成的试剂制备。它已被用作亲硫试剂,对于适合溴化的底物,其亲硫性优于其溴化能力。这是制备异硫氰酸酯的可持续过程,因为用过的试剂可以回收、再生和重复使用。