Substituted potassium internal vinyltrifluoroborates: preparation and use in Suzuki–Miyaura cross-coupling reactions
作者:Shivanand K. Math、Homayoun H. Mokri、James B. LaMunyon、Dustin R. Cefalo、Charles A. Testa
DOI:10.1016/j.tetlet.2012.03.119
日期:2012.6
A collection of substituted potassium internal vinyltrifluoroborates was prepared and utilized in palladium-catalyzed cross-coupling reactions with aryl and heteroaryl halides. The cross-coupling reactions proceeded readily with Pd(PPh3)4 as a catalyst in toluene/H2O under reflux in the presence of Cs2CO3. The process is regiospecific with regard to the internal vinyltrifluoroborate starting material
制备了一组取代的内部乙烯基三氟硼酸钾,并将其用于钯催化的与芳基和杂芳基卤化物的交叉偶联反应。在甲苯中,在Cs 2 CO 3的存在下,在回流下,Pd(PPh 3)4作为催化剂在甲苯/ H 2 O中易于进行交叉偶联反应。该方法对于内部三氟硼酸乙烯基酯原料是区域特异性的,并且可以耐受多种官能团。取代的内部乙烯基三氟硼酸酯的这一独特集合可轻松用于研究药物应用中。