制备了聚酰胺-胺(PAMAM)-2-吡啶甲醛(Py)席夫碱树枝状大分子及其钯配合物.通过红外、核磁共振、元素分析、等离子耦合原子发散光谱及热重-差热等分析手段对其进行了结构确证.研究了PAMAM-2-吡啶甲醛席夫碱钯配合物在Heck反应中的催化性能.以三乙胺(Et3N)作为缚酸剂,碘代苯(PhI):10 mmol,n(PhI)∶n(AA)∶ n(Et3N)为1∶1.4∶2.5,n(Pd) =6.1×10-3 mmol(5.0G PAMAMPy-Pd),在5 mL DMF中,100℃和N2气保护下反应25 min,产率90.1％.催化剂经过简单的过滤可回收,重复使用3次产率仍可达82.0％.
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