Synthesis of a Base-Stabilized Silicon(I)–Iron(II) Complex for Hydroboration of Carbonyl Compounds

作者：Sabrina Khoo, Jia‐Jia Cao, Fiona Ng, Cheuk‐Wai So · 发表于：Inorganic Chemistry · 年份：2018 · DOI：10.1021/acs.inorgchem.8b01760 · 被引用次数：30 · 研究领域：Organoboron and organosilicon chemistry、Asymmetric Hydrogenation and Catalysis、Organometallic Complex Synthesis and Catalysis

The reaction of the amidinatosilicon(I) dimer [LSi:] 2 ( 1; L = PhC(N t Bu) 2 ) with FeBr 2 in tetrahydrofuran (THF) at ambient temperature afforded the silicon(I)–iron(II) dimer [LSi(FeBr 2 ·THF)] 2 ( 2 ) after 40 h. Compound 2 can catalyze hydroboration of aliphatic and aromatic ketone compounds with HBpin in the absence of any strong reducing agent. Mechanistic studies show that complex 2 reacts with ketone compounds to form a zwitterionic intermediate in the first step of catalysis. Subsequent reaction with HBpin affords the corresponding boron esters and then regenerates complex 2 .