with hydrofluoric acid generates an in situ tetracoordinate hydronium organotrifluoroborate species which undergoes counterion exchange with tetra-n-butylammonium hydroxide. The resultant tetraalkylammonium salts are as air and moisture stable as their potassium organotrifluoroborate counterparts with the added advantage of being readily soluble in organic media. They were found to undergo Pd-catalyzed
用
氢氟酸处理有机
硼酸可生成原位四配位有机三
氟硼酸氢合盐,该四价氢合氢鎓与四正丁基氢氧化
铵进行抗衡离子交换。所得四烷基
铵盐与其有机三
氟硼酸钾对应物一样,对空气和湿气稳定,具有易于溶于有机介质的附加优点。发现它们在温和的条件下与各种芳基和烯基卤化物进行Pd催化的Suzuki-Miyaura交叉偶联。它们在
钯催化下与酰基卤的交叉偶联也可能产生酮。