PREPARATION OF PENTAFLUOROSULFANYL (SF5) HETEROCYCLES: PYRROLES AND THIOPHENES
申请人:Zheng Zhaoyun
公开号:US20110040103A1
公开(公告)日:2011-02-17
The subject invention pertains to pentafluorosulfonyl (SF5) substituted pyrroles, thiophenes, 3-pyrrolines and 2,5-dihydrothiophenes, as well as methods for their synthesis.
本发明涉及五氟磺酰(SF5)取代的吡咯、噻吩、3-吡咯烷和2,5-二氢噻吩,以及它们的合成方法。
Preparation of Pentafluorosulfanyl (SF<sub>5</sub>) Pyrrole Carboxylic Acid Esters
作者:William R. Dolbier、Zhaoyun Zheng
DOI:10.1021/jo9007699
日期:2009.8.7
paper, a facile preparation of SF5-substituted pyrrole carboxylic acid esters in good yield is reported. Utilizing the cycloaddition of an azomethine ylide to pentafluorosulfanylalkynes, a series of dihydropyrroles were prepared and oxidized to the respective 1-tert-butyl-4-(pentafluorosulfanyl)pyrrole-2-carboxylic acid esters in good yield. Further treatment of these pyrroles with catalytic triflic
transition-metal-free and stereoselective approach for the synthesis of Z-vinyl fluorides from alkynes containing unexplored SF5 and SF4 groups has been reported. TBAF ⋅ 3H2O exhibits high compatibility, allowing for easy incorporation of fluoride into SF5 and SF4 alkynes at roomtemperature. Competitive experiments and DFT calculations verify that SF5 alkynes react much faster than SF4 alkynes.
已经报道了一种由含有未探索的SF 5和SF 4基团的炔烃合成Z-乙烯基氟化物的无过渡金属和立体选择性方法。 TBAF·3H 2 O具有高相容性,可以在室温下轻松将氟化物引入SF 5和SF 4炔烃中。竞争性实验和 DFT 计算证实 SF 5炔烃的反应速度比 SF 4炔烃快得多。
US7943787B2
申请人:——
公开号:US7943787B2
公开(公告)日:2011-05-17
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-dipolarcycloadditions 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 nitrileoxides, and 4-SF5-substituted isoxazolines were obtained when nitrones were used as the 1,3-dipole