Synthetic and Structural Studies of 2-Acylmethyl-6-R-Difunctionalized Pyridine Ligand-Containing Iron Complexes Related to [Fe]-Hydrogenase
作者:Li-Cheng Song、Kai-Kai Xu、Xiao-Feng Han、Ji-Wei Zhang
DOI:10.1021/acs.inorgchem.5b02490
日期:2016.2.1
6-(COCH2)2C5H3N]Fe(CO)2(L4) (11, L4 = PPh3; 12, CO) and η3-2-(COCH2-6-ArSCH2C5H3N)Fe(CO)2(ArS) (13, ArS = PhS; 14, 2-S-5-MeC4H2O) were obtained, unexpectedly, when 2,6-(TsOCH2)2C5H3N reacted with Na2Fe(CO)4 followed by treatment of the resulting mixture with ligands PPh3 and CO or disulfides (PhS)2 and (2-S-5-MeC4H2O)2. Reactions of ligand precursors 3 and 2,6-(TsOCH2)2C5H3N with Na2Fe(CO)4 were monitored
作为活性部位的模型的[Fe] -hydrogenase,三齿2-酰基甲基-6-甲氧基甲氧基双官能含吡啶络合物η 3 - (2-COCH 2 -6-MeOCH 2 OC 5 H ^ 3 N)的Fe(CO)2(通过以下多步反应制备L 1)(4,L 1= I;5,SCN;6,PhCS 2):(i)将2-MeO 2 C-6-HOC 5 H 3 N与ClCH 2 OMe醚化。得到2-MeO 2 C-6-MeOCH 2 OC 5 H 3N(1),(ii)用NaBH 4还原1得到2-HOCH 2 -6-MeOCH 2 OC 5 H 3 N(2),(iii)2与4-甲苯磺酰氯酯化得到2-TsOCH 2 -6-MeOCH 2 OC 5 H 3 N(3),(iv)用Na 2 Fe(CO)4进行3的亲核取代,然后处理所得的Fe(0)中间体Na [(2-CH 2 -6 -MeOCH 2 OC 5 H 3N)Fe(CO)4