摘要
以4-(对羟基苯基)-2,2';6',2″-联三吡啶为配体,盐酸活化的硅胶为载体,制备了二氧化硅负载的钯催化剂SiO_2-tpy-Pd。120℃下,DMF为溶剂、K_2CO_3作为碱,四丁基溴化铵(TBAB)为相转移催化剂,负载型SiO_2-tpy-Pd催化剂用量为0.5 mol%,可有效促进芳基卤与芳硼酸的Suzuki-Miyaura偶联反应。该负载钯催化剂循环使用6次,催化活性无显著降低。
The SiO_2 supported terpyridine-palladium( SiO_2-tpy-Pd) catalyst was prepared by 4-( [2,2'; 6',2″-terpyridin]-4'-yl)phenol as ligand and silica gel as carrier.The Suzuki-Miyaura reaction of aryl halide with aryl boric acid can be effectively promoted under the reaction temperature of 120 ℃,DMF as solvent,K_2CO_3 as base,TBAB as phase transfer catalyst,supported catalyst loading 0. 5 mol%.The catalyst can be reused at least six times without distinct activity decrease.
引文
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