[reaction: see text]. In the copper salt catalyzed ether formation from aryl bromides or iodides and phenols, 2,2,6,6-tetramethylheptane-3,5-dione (TMHD) was found to greatly accelerate the ordinarily difficult reaction, making it occur under more moderate temperatures and reaction times. A series of aryl halides and phenols were shown to form ethers in NMP as the solvent, cesium carbonate as the base
[反应:请参见文字]。在由芳基
溴化物或
碘化物和
苯酚形成的
铜盐催化的醚形成中,发现
2,2,6,6-四甲基庚烷-3,5-二酮(
TMHD)极大地促进了通常困难的反应,使其在更温和的温度下发生和反应时间。一系列芳基卤化物和
苯酚显示在
NMP中作为溶剂,
碳酸铯作为碱,CuCl和
TMHD作为催化剂形成醚。该反应被证明可以耐受富电子的芳基
溴化物和电子中性
苯酚。