Synthesis of a diimidazolylporphyrin pincer palladium complex
Synthesis of a diimidazolylporphyrin pincer palladium complex
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二咪唑基卟啉钳钯配合物的合成
DOI：
10.1142/s1088424611002908
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
A.
中科院分区：
文献类型：
--
作者：
Yamamoto;J.;Shimizu;T.;Yamaguchi;S.;Aratani;N.;Shinokubo;H.;Osuka;A.
合成了一种新型的以卟啉为骨架的NCN型钯钳形配合物。钯原子被两个咪唑基团有效地固定在卟啉中心的碳原子上。用光谱分析和X-射线衍射法对产物进行了表征。结果表明，由于外钯中心的配位作用，卟啉大环的结构发生了严重的扭曲。变形程度甚至大于类似的以吡啶为支撑基的钯钳形配合物。该络合物在催化剂负载量为0.005%的条件下，对碘苯与丙烯酸丁酯的Mizoroki-Heck反应具有较高的催化活性。
A novel NCN type palladium pincer complex based on the porphyrin backbone was synthesized. The palladium atom bound to themeso-carbon of the porphyrin core was effectively supported by two imidazolyl groups. The product was characterized by spectroscopic and X-ray diffraction analysis. The structure of the porphyrinic macrocycle was revealed to be highly distorted by the coordination of the outer palladium center. The degree of deformation was found to be even larger than the analogous palladium pincer complexes in which pyridine groups were employed as the supporting ligands. The complex exhibited high catalytic activity in the Mizoroki-Heck reaction of iodobenzene with butyl acrylate with 0.005% of the catalyst loading.