Sulfur-Based Protecting Groups for Pyrroles and the Facile Deprotection of 2-(2,4-Dinitrobenzene)sulfinyl and Sulfonyl Pyrroles
作者:Alison Thompson、R. Jonathan Butler、Meaghan N. Grundy、Andrea B. E. Laltoo、Katherine N. Robertson、T. Stanley Cameron
DOI:10.1021/jo050077b
日期:2005.4.1
effectiveness of simple sulfinyl and sulfonyl groups as electron-withdrawing protecting groups for pyrroles has been analyzed using 13C NMR spectroscopy and confirmed by consideration of X-ray crystal structures. Additionally, the 2,4-dinitrobenzenesulfinyl and sulfonyl groups are shown to be effective electron-withdrawing protecting groups for pyrroles, and they can be removed by treatment with benzene
简单的亚磺酰基和磺酰基作为吡咯的吸电子保护基的有效性已使用13 C NMR光谱法进行了分析,并通过考虑X射线晶体结构得到了证实。另外,已表明2,4-二硝基苯亚磺酰基和磺酰基是吡咯的有效的吸电子保护基,它们可以通过在温和和特定条件下用苯硫醇或硫醇盐处理而除去。