Synthesis and Catalytic Activity of (3,4-Diphenylcyclopentadienone)Iron Tricarbonyl Compounds in Transfer Hydrogenations and Dehydrogenations
作者:Timothy W. Funk、Andrew R. Mahoney、Rebecca A. Sponenburg、Kathryn P. Zimmerman、Daniel K. Kim、Emily E. Harrison
DOI:10.1021/acs.organomet.8b00037
日期:2018.4.9
4-diphenylcyclopentadienone)iron tricarbonyl compounds were synthesized, and their activities in transfer hydrogenations of carbonyl compounds and transfer dehydrogenations of alcohols were explored and compared to those of the well-established [2,5-(SiMe3)2-3,4-(CH2)4(η4-C4C═O)]Fe(CO)3 (3). A new compound, [2,5-bis(3,5-dimethylphenyl)-3,4-diphenylcyclopentadienone]iron tricarbonyl (7), was the most
四个合成(3,4- diphenylcyclopentadienone)三羰基铁化合物,以及它们在羰基化合物和醇的转移脱氢的转移氢化活性探索和相比,这些行之有效[2,5-的(森达3)2 - 3,4-(CH 2)4(η 4 -C 4 C = O)]的Fe(CO)3(3)。一种新化合物[2,5-双(3,5-二甲基苯基)-3,4-二苯基环戊二烯酮]三羰基铁(7)是转移加氢和脱氢中活性最高的催化剂,化合物3是转移氢化中活性最低的催化剂。证据被发现的两种产物抑制3和7中的转印脱氢反应,具有的活性3被更重地影响。在转移氢化过程中用光谱法观察到由7衍生的单体氢化铁,在还原或氧化条件下未发现二铁桥接氢化物。N-亚苄基苯胺的转移氢化的初步结果表明,与(3,4-二苯基环戊二烯酮)三羰基铁化合物相比,3的活性明显较低。