Ni-Catalyzed Arylboration of Unactivated Alkenes: Scope and Mechanistic Studies
作者:Stephen R. Sardini、Alison L. Lambright、Grace L. Trammel、Humair M. Omer、Peng Liu、M. Kevin Brown
DOI:10.1021/jacs.9b03991
日期:2019.6.12
unactivated monosubstituted, 1,1-disubstituted, and trisubstituted alkenes is disclosed. The reaction is notable in that it converts highly substituted alkenes, aryl bromides, and diboron reagents to products that contain a quaternary carbon and a synthetically versatile carbon-boron bond with control of stereoselectivity and regioselectivity. In addition, the method is demonstrated to be useful for the
Enantioselective Copper-Catalyzed Methylboration of Alkenes
作者:Bin Chen、Peng Cao、Yang Liao、Min Wang、Jian Liao
DOI:10.1021/acs.orglett.7b03860
日期:2018.3.2
on (B2(pin)2), and methyl iodide is reported. Alkenes including styrenes, β-substituted styrenes, and challenging aliphatic olefins were smoothly transferred to the desired methylboration products with excellent diastereoselectivities (dr up to >99:1) and enantioselectivities (er up to 99:1). The utility of this process was demonstrated by the synthesis of naproxen and formal synthesis of two natural
Copper-Catalyzed Three-Component Carboboration of Alkynes and Alkenes
作者:Hiroto Yoshida、Ikuo Kageyuki、Ken Takaki
DOI:10.1021/ol4001526
日期:2013.2.15
Carboboration of alkynes was found to take place efficiently by a three-component coupling reaction with diboron and carbon electrophiles under copper catalysis to afford diverse multisubstituted borylalkenes in a stereoselective manner. The carboboration was also applicable to alkenes, leading to the formation of multisubstituted borylalkanes via regioselective carbon–boron and carbon–carbon bond-forming