A Nickel‐Catalyzed Benzannulation Approach to Aromatic Boronic Esters

Abstract

Off and on: A nickel-catalyzed benzannulation 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). Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.