作者:Aileen P. Lothian、Christopher A. Ramsden、Maxine M. Shaw、Rachel G. Smith
DOI:10.1016/j.tet.2011.02.016
日期:2011.4
Reaction of aryltrimethylsilanes with xenon difluoride in C6F6/Pyrex® at room temperature gives aryl fluorides in good yield. The reaction is inhibited when acetonitrile is used as solvent but proceeds well in CFCl3/Pyrex® or CH2Cl2/Pyrex®. Pyrex® appears to be a very effective heterogeneous catalyst for this ipso-fluorination. The reaction does not proceed in PTFE, quartz, soda glass or glassy-carbon
的用C用二氟化氙aryltrimethylsilanes反应6 ˚F 6 /的Pyrex ®在室温下给出良好产率的芳基氟化物。当使用乙腈作为溶剂,但在CFCL进入孔中的反应被抑制3 /耐热玻璃®或CH 2氯2 /的Pyrex ®。高硼硅®似乎是这是一个非常有效的非均相催化剂IPSO -fluorination。该反应不继续进行PTFE,石英,钠钙玻璃或玻碳烧瓶或派热克斯®烧瓶预先漂洗,用2M NaOH中。芳基三甲基锡烷和芳基硼酸及其酯不经过ipso-在相似条件下氟化。涉及电加成偏振光二氟化氙的似是而非的机制[FXE δ+ ⋯˚F→的Pyrex δ- ]随后在配体偶联进行了讨论。