以聚醚为载体的钯络合催化剂

以聚醚为载体的钯络合催化剂 POLYETHER SUPPORTED PALLADIUM COMPLEX CATALYSTS 卢雪然 Lu Xueran 1 2 3 first-author 肖超勃 Xiao Chaobo 1 2 3 陈远荫 Chen Yuanyin 1 2 3 Department of Chemistry Wuhan University Department of Chemistry Wuhan University Department of Chemistry, Wuhan University Department of Chemistry, Wuhan University Department of Chemistry Wuhan University Department of Chemistry Wuhan University Department of Chemistry Wuhan UniversityDepartment of Chemistry Wuhan University Department of Chemistry Wuhan UniversityDepartment of Chemistry Wuhan University 从ω-氯烷基环氧丙基醚、对亚苯基双环氧丙基醚、丁基环氧丙基醚和苯基环氧丙基醚出发,合成了两种含ω-氯的线型聚醚和四种交联型聚醚。上述聚醚与二苯瞵锂或二苯膦钾反应,再与氯亚钯酸钠作用,得到六种膦化聚醚及相应的大种以聚醚为载体的钯膦络合物。用烯烃和硝基苯作为底物评价了聚醚负载的钯膦络合物的催化活性。交联型聚醚负载的钯膦络合物活性较高,以苯基环氧丙基醚为第三组份优于丁基环氧丙基醚,配位基与主链距离加大对催化剂的活性有利。 Two linear and four crosslinked polyethers bearing ω-chlorine in side chain were prepared from β-ehloroethylglycidyl ether or ω-chlorohexyl glycidyl ether, p-phenylenediglycidyl ether, and butyl glycidyl ether or phenyl glycidyl ether by ring-openning polymerization or eopolymerization in the presence of BF 3 ·Et 2 O as catalyst. The chlorine-containing polyethers were further reacted with Ph 2 PK or Ph 2 PLi, and then treated with sodium chloropalladite to form the title polyether-bound palladium complex catalysts. Styrene, 1-hexene, cyelohexene, and nitrobenzene were used as substrates in hydrogenation reaction to evaluate the activity and selectivity of the above mentioned complex catalysts. The results showed that crosslinked polyethers are better carriers than corresponding linear polyethers, using phenylglycidyl ether to replace butyl glycidyl ether as the third component in copolymerization reaction and increasing the length of spacer both are of benefit to the activity of the catalyst. 聚醚 负载催化剂 钯膦络合物 氢化 Polyethers supported-catalysts Palladium-phosphine complex Hydrogenation 1988-04-01 2021-04-01 4