多足聚醚的合成及其络合与催化性能

多足聚醚的合成及其络合与催化性能 SYNTHESIS AND CATION-COMPLEXATION AND CATALYTIC PROPERTIES OF ACYCLIC POLYPODE POLYETHERS 徐羽梧 first-author 张小玲 王富华 王洪祚 用β—氯乙基缩水甘油醚均聚物分别与甲醇、乙二醇单甲醚和一缩二乙二醇单乙醚的钠盐进行反应,合成了三种侧链长短不同的线型多足聚醚。若在反应体系中添加少量三元醇化合物,则可得到交联型多足聚醚。研究了这类聚醚对K + 、Na + 的络合性能以及它们在Wolff-Kishner反应、碘代反应和二氯卡宾加成反应中作为相转移催化剂的活性。实验结果表明,这类多足聚醚是上述反应有效的相转移催化剂。交联型多足聚醚尚具有反应后易于回收和重复使用的优点。 Three new acyclic polypode polyethers Ⅰ、Ⅱ、Ⅲ were synthesized by reaction of poly（β-chloroethyl）glycidyl ether with the monosodium salts of methanol、ethylene glycol monomethyl ether and diethylene glycol monoethyl ether respectively. The cation-complexation ability and catalytic activity of these polyethers were investigated. Results showed that all the polymers are effective phase-transfer catalysts for substitution reaction such as substitution of bromine in n-octylbromide by iodine and the Wolff-Kishner reaction, such as the reduetion of diphenyl ketonhydrazone to form diphenylmethane, as well as the addition reaction of dichlorocarbene to styrene to form 2, 2-dichlorocyelopropyl benzene. The activity of polypode polyether Ⅱ is comparable to that of DB 18—C—6 and 18—C—6. The crosslinked polyether Ⅱ can be recovered and reused twice without remarkable lose of activity. 1985-04-01 2021-04-01 4