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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Aerobic oxidation of primary alcohols catalyzed by copper complexes of 1,10-phenanthroline-derived ligands
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Aerobic oxidation of primary alcohols catalyzed by copper complexes of 1,10-phenanthroline-derived ligands

机译：1,10-菲咯啉衍生的配体的铜配合物催化伯醇的好氧氧化

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摘要

Five copper complexes [(L~1)_2Cu(H_20)](C10_4)_2 (1), [(L~1)Cu(H_20)_3](C10_4)_2 (la), [(L~3)_2Cu(H_20)](C10_4)_2 (2), [(L~5)_2Cu(H_20)](C10_4)_2 (3) and [(L~6)_2Cu](C10_4) (4) (where L~1 = 1,10-phenanthroline, L~3 = 1,10-phenanthroline-5,6-dione, L~5 = 1,10-phenanthrolinefuroxan and L~6 = 2,9-dimethyl-1,10-phenanthrolinefuroxan), and in situ prepared copper complexes of 2,9-dimethyl-1,10-phenanthroline (L~2) or 2,9-dimethyl-1,10-phenanthrolinedione (L~4) were used for aerial oxidation of primary alcohols to the corresponding aldehydes under ambient conditions. The copper catalysts have been found to catalyze a series of primary alcohols including one secondary alcohol with moderate turnover numbers and selectivity towards primary alcohols. Copper(II) complexes 1 (or la) and 2 were found to be the better catalysts among all other systems explored in this study. A copper(II)-superoxo species is implicated to initiate the oxidation reaction. Structural and electronic factors of 1,10-phenanthroline-based ligands affecting the catalytic results for aerial oxidation of alcohols are discussed.
机译：五个铜络合物[（L〜1）_2Cu（H_20）]（C10_4）_2（1），[（L〜1）Cu（H_20）_3]（C10_4）_2（la），[（L〜3）_2Cu（ H_20）]（C10_4）_2（2），[（L〜5）_2Cu（H_20）]（C10_4）_2（3）和[（L〜6）_2Cu]（C10_4）（4）（其中L〜1 = 1,10-菲咯啉，L〜3 = 1,10-菲咯啉-5,6-二酮，L〜5 = 1,10-菲咯啉呋喃喃和L〜6 = 2,9-二甲基-1,10-菲咯啉呋喃喃）和原位制备的2,9-二甲基-1,10-菲咯啉（L〜2）或2,9-二甲基-1,10-菲咯啉二酮（L〜4）的铜络合物用于将伯醇空中氧化为相应的醛在环境条件下。已经发现铜催化剂可催化一系列伯醇，包括一种仲醇，具有中等的转化率和对伯醇的选择性。铜（II）配合物1（或1a）和2被发现是本研究中探索的所有其他系统中较好的催化剂。涉及铜（II）-超氧物种以引发氧化反应。讨论了基于1,10-菲咯啉基配体的结构和电子因素，这些因素影响醇的空气氧化催化效果。

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