Electrochemical Borylation of Alkyl Halides: Fast, Scalable Access to Alkyl Boronic Esters
作者:Bingbing Wang、Pan Peng、Wan Ma、Zhao Liu、Cheng Huang、Yangmin Cao、Ping Hu、Xiaotian Qi、Qingquan Lu
DOI:10.1021/jacs.1c06473
日期:2021.8.25
Herein, a fast, scalable, and transition-metal-free borylation of alkyl halides (X = I, Br, Cl) enabled by electroreduction is reported. This process provides an efficient and practical access to primary, secondary, and tertiary boronic esters at a high current. More than 70 examples, including the late-stage borylation of natural products and drug derivatives, are furnished at room temperature, thereby
Zinc-Catalyzed Borylation of Primary, Secondary and Tertiary Alkyl Halides with Alkoxy Diboron Reagents at Room Temperature
作者:Shubhankar Kumar Bose、Katharina Fucke、Lei Liu、Patrick G. Steel、Todd B. Marder
DOI:10.1002/anie.201308855
日期:2014.2.10
A new catalytic system based on a ZnII NHC precursor has been developed for the cross‐coupling reaction of alkyl halides with diboron reagents, which represents a novel use of a Group XII catalyst for CX borylation. This approach gives borylations of unactivated primary, secondary, and tertiary alkyl halides at room temperature to furnish alkyl boronates, with good functional‐group compatibility,
A copper(II)-catalyzed borylation of alkyl halides with bis(pinacolato)diboron (B2pin2) has been developed, which can be carried out in air, providing a wide range of primary, secondary, and some tertiary alkylboronates in high yields. A variety of functional groups are tolerated and the protocol is also applicable to unactivated alkyl chlorides (including 1,1- and 1,2-dichlorides). Preliminary mechanistic