Transition-Metal-Free Borylation of Alkyl Iodides via a Radical Mechanism
作者:Qianyi Liu、Junting Hong、Beiqi Sun、Guangcan Bai、Feng Li、Guoquan Liu、Yang Yang、Fanyang Mo
DOI:10.1021/acs.orglett.9b01951
日期:2019.9.6
transition-metal-free borylation of alkyliodides. This method uses commercially available diboron reagents as the boron source and exhibits excellent functional group compatibility. Furthermore, a diverse range of primary and secondaryalkyliodides could be effectively transformed to the corresponding alkylboronates in excellent yield. Mechanisticinvestigations suggest that this borylation reaction
Catalytic Boration of Alkyl Halides with Borane without Hydrodehalogenation Enabled by Titanium Catalyst
作者:Xianjin Wang、Penglei Cui、Chungu Xia、Lipeng Wu
DOI:10.1002/anie.202100569
日期:2021.5.25
titanium‐catalyzed boration of alkyl (pseudo)halides (alkyl‐X, X=I, Br, Cl, OMs) with borane (HBpin, HBcat) is reported. The use of titanium catalyst can successfully suppress the undesired hydrodehalogenation products that prevail using other transition‐metal catalysts. A series of synthetically useful alkyl boronate esters are readily obtained from various (primary, secondary, and tertiary) alkyl electrophiles,
iron: A new PNN iron complex has been developed for use in an iron‐catalyzed alkenehydroboration reaction under mild conditions. The environmentally friendly and earth‐abundant iron catalyst system is superior to precious‐metal systems in terms of efficiency and selectivity for α‐olefin hydroborations with pinacolborane.