Investigation of Alkyne Regioselectivity in the Ni-Catalyzed Benzannulation of Cyclobutenones
作者:Timo Stalling、Wesley R. R. Harker、Anne-Laure Auvinet、Erik J. Cornel、Joseph P. A. Harrity
DOI:10.1002/chem.201405863
日期:2015.2.2
A Ni‐catalyzed benzannulationreaction of cyclobutenones and alkynes provides a rapid synthesis of heavily substituted phenols. The regioselectivity of this reaction can be modulated by variation of substituents on the alkyne. Though the incorporation of Lewis basic donors provides modest selectivities, the use of aryl substituents can provide high levels of regiocontrol. Finally, alkynylboronates
[EN] PROCESS COMPRISING THE REACTION OF CYCLOBUTENONE WITH ALKYNYL BORONIC ACID OR DERIVATIVE THEREOF IN THE PRESENCE OF TRANSITION METAL OLEFIN COMPLEX CATALYST<br/>[FR] COMPOSÉS ET LEURS PROCÉDÉS DE PRÉPARATION
申请人:UNIV SHEFFIELD
公开号:WO2012073038A3
公开(公告)日:2012-07-19
A Nickel‐Catalyzed Benzannulation Approach to Aromatic Boronic Esters
作者:Anne‐Laure Auvinet、Joseph P. A. Harrity
DOI:10.1002/anie.201007598
日期:2011.3.14
Off and on: A nickel‐catalyzedbenzannulation of alkynylboronates provides functionalized phenols with high levels of chemo‐ and regioselectively. While transmetalation of organoboron intermediate to organonickel does not occur during cycloaddition, it is “switched on” by addition of base, thus allowing a one‐pot benzannulation and cross‐coupling to be realized (see scheme; Pin=pinacolato, Ms=mesyl)