Linear or cyclic aminophosphonates as pH markers in phosphorus 31 NMR spectroscopy
申请人:Centre National de la Recherche Scientifique (CNRS)
公开号:US06528656B1
公开(公告)日:2003-03-04
Linear or cyclic aminophosphonates are disclosed which are useful as pH markers. A method of using the linear or cyclic aminophosphonates in phosphorus-31 NMR spectroscopy is also disclosed.
three-component heterocyclization of alkynes, perfluoroalkyl halides, and 1,3-dinucleophiles was developed for the efficientsynthesis of privileged (E)-perfluoroalkenyl pyrroles. The reaction proceeded through a rationally designed sequence of radical perfluoroalkylation and intramolecular defluorinative [3 + 2]-heterocyclization. The utility of perfluoroalkyl halide as a perfluoroalkenyl reagent, by
开发了银促进的炔烃、全氟烷基卤化物和1,3-二亲核体的三组分杂环化,用于高效合成特权( E )-全氟烯基吡咯。该反应通过合理设计的自由基全氟烷基化和分子内脱氟[3+2]-杂环化序列进行。利用全氟烷基卤化物作为全氟烯基试剂,通过对全氟烷基链上邻碳中心的两个惰性C(sp 3 )–F键进行选择性和可控的官能化,为合成增值有机氟化物提供了一种新的反应模式易于获得且成本低廉的氟化原料。