A series of new fiber catalysts has been synthesized by aminating a commercially available polyacrylonitrile fiber with polyamines such as diethylenetriamine and triethylenetetramine. These fiber catalysts can efficiently catalyze the Knoevenagel condensation of benzaldehyde and ethyl cyanoacetate in water (yields: 95–98%). The triethylenetetramine aminated fiber catalyst was used to catalyze the condensations of a wide range of aromatic aldehydes and active methylene compounds and in each case, this catalyst performed well with yields higher than 93%. This fiber catalyst also exhibited excellent reusability (up to 21 times) and photostability.
通过将市售聚
丙烯腈纤维与聚胺(如
二亚乙基三胺和
三亚乙基四胺)进行胺化,合成了一系列新型纤维催化剂。这些纤维催化剂能高效催化
苯甲醛与
氰乙酸乙酯在
水中进行的Knoevenagel缩合反应(产率:95-98%)。
三亚乙基四胺胺化纤维催化剂被用于催化多种芳香醛与活性甲基化合物之间的缩合反应,并且每种情况下,该催化剂都表现出色,产率均高于93%。此纤维催化剂还具有优异的重复使用性(可达21次)和光稳定性。