Use of 1-pentafluorosulfanyl-phenylacetylenes for the preparation of SF5-substituted five-membered ring heterocycles through 1,3-dipolar cycloadditions. Isoxazoles and isoxazolines
作者:Simon E. Lopez、Akira Mitani、Priscila Pena、Ion Ghiviriga、William R. Dolbier
DOI:10.1016/j.jfluchem.2015.06.006
日期:2015.8
synthetic methodology utilizing 1,3-dipolar cycloadditions was developed for the preparation of pentafluorosulfanyl-substituted heterocycles using SF5-substituted arylacetylenes as key building block dipolarophiles. A group of 4-SF5-isoxazoles were prepared in moderate yields using in situ generated nitrile oxides, and 4-SF5-substituted isoxazolines were obtained when nitrones were used as the 1,3-dipole
开发了利用1,3-偶极环加成的合成方法,以使用SF 5-取代的芳基乙炔作为关键的双极性亲和剂来制备五氟硫烷基取代的杂环。使用原位生成的腈氧化物以中等收率制备了一组4-SF 5-异恶唑,当将硝酮用作1,3-偶极子时,获得了4-SF 5-取代的异恶唑啉。