PCP Pincer Palladium Complexes and Their Catalytic Properties: Synthesis via the Electrophilic Ligand Introduction Route
作者:Tsutomu Kimura、Yasuhiro Uozumi
DOI:10.1021/om060506b
日期:2006.9.1
variety of PCP pincer palladium complexes having phosphinito groups [2,6-(R2PO)2C6H3PdI (R = alkyl, aryl and Et2N)] were synthesized via the electrophilic ligand introduction route with high efficiency. Thus, trans-(2,6-dihydroxyphenyl)iodobis(triphenylphosphine)palladium was prepared by the reaction of 2-iodoresorcinol with tetrakis(triphenylphosphine)palladium, and the palladium complex was converted
通过亲电配体引入途径,高效合成了具有膦基[2,6-(R 2 PO)2 C 6 H 3 PdI(R =烷基,芳基和Et 2 N)]的多种PCP夹心钯配合物。因此,反式-2-(2,6-二羟基苯基)碘代双(三苯基膦)钯是通过2-异戊二烯醇与四(三苯基膦)钯反应制得的,并且在三乙胺存在下通过用氯膦处理将钯配合物转化为PCP夹钳式钯配合物。收率为82-95%。钳形复合物的X射线分子结构分析表明,分子采用扭曲的正方形平面几何形状。4-溴苯乙酮与苯基硼酸的Suzuki偶联反应是在0.1-0.01 mol%的钳形络合物存在下进行的,生成4-乙酰基联苯的周转数为328-5790。