Synthesis of Sulfonyl Azides via Diazotransfer using an Imidazole-1-sulfonyl Azide Salt: Scope and <sup>15</sup>N NMR Labeling Experiments
作者:Marc Y. Stevens、Rajiv T. Sawant、Luke R. Odell
DOI:10.1021/jo500553q
日期:2014.6.6
Imidazole-1-sulfonyl azide hydrogen sulfate is presented as an efficient reagent for the synthesis of sulfonyl azides from primary sulfonamides. The described method is experimentally simple and high-yielding and does not require the addition of Cu salts. Furthermore, 15N NMR mechanistic studies show the reaction proceeds via a diazo transfer mechanism. Imidazole-1-sulfonyl azide hydrogen sulfate provides
咪唑-1-磺酰基叠氮化物硫酸氢盐被认为是由伯磺酰胺合成磺酰基叠氮化物的有效试剂。所描述的方法在实验上简单且产率高,并且不需要添加铜盐。此外,15 N NMR机理研究表明反应是通过重氮转移机理进行的。就冲击稳定性,成本和易于使用而言,咪唑-1-磺酰基叠氮化物硫酸氢盐与现有的重氮转移试剂相比具有明显的优势。
Evaluation of dipole moment and electrophilicity on the nature of click-type coupling reaction between thioamide and sulfonyl azide
computational investigation on sulfonyl amidine formation from thioamides and sulfonylazides is described. The data support a non-concerted two-step pathway for the coupling reaction and also indicate that dipole moment of thioamide and electrophilicity of sulfonylazide would be significant factors for the reaction efficiency. A simple reactivity prediction of the coupling reaction was demonstrated by preliminary