Group VIII carbamoyl complexes as catalysts for alkyne hydrocarboxylation and electrochemical proton reduction
作者:Chandan Kr Barik、Malcolm E. Tessensohn、Richard D. Webster、Weng Kee Leong
DOI:10.1016/j.jorganchem.2019.03.019
日期:2019.7
A series of group VIII carbamoyl complexes, [M(2-NHC(O)C5H4N)(CO)2(2-SC5H4N)] [where M = Fe, Ru and Os], was found to be efficient and regioselective catalysts for the intramolecular hydroxycarboxylation of α,ω-alkynoic acids, yielding exocyclic enol lactones for ring sizes up to 7 atoms, and endocyclic enol lactones for ring sizes up to 12 atoms. They also catalysed the regioselective intermolecular
发现了一系列的VIII族氨基甲酰基配合物,[M(2-NHC(O)C 5 H 4 N)(CO)2(2-SC 5 H 4 N)] [其中M = Fe,Ru和Os]是有效的区域选择性催化剂,可用于α,ω-链烷酸的分子内羟基羧化反应,可制得环尺寸最大为7个原子的环外烯醇内酯,而环尺寸最大可形成12个原子的内环烯醇内酯。他们还催化了炔丙醇和羧酸之间的区域选择性分子间羟基羧化反应,形成β-氧代酯。这些络合物还可以在质子还原中充当电催化剂,对其氧化还原电位的评估表明,铁络合物比钌或类似物的效率要高得多。