demonstrated in the selective borylation of a variety of aromatics (>50 examples). This strategy was used in the late‐stage derivatization of pharmaceuticals and natural products. Computations reveal the mechanistic details of the unprecedented C−O bond activation of carboxylic acids. By circumventing the challenging decarboxylation, this strategy provides a general synthetic platform to access arylpalladium
Ambient-Temperature Cobalt-Catalyzed Cycloaddition Strategies to Aromatic Boronic Esters
作者:Anne-Laure Auvinet、Joseph P. A. Harrity、Gerhard Hilt
DOI:10.1021/jo1004907
日期:2010.6.4
The room-temperature cobalt-catalyzed [4 + 2] cycloaddition of alkynylboronates and 1,3-dienes provides a convenient and general method for the synthesis of benzene-based aromatic boronicesters. Two complementary aromatization strategies involving in situ elimination and DDQ oxidation were explored, with the latter finding more generality. Finally, the potential of this technique to generate highly
Rhodium-Catalyzed <i>ipso</i>-Borylation of Alkylthioarenes via C–S Bond Cleavage
作者:Yuta Uetake、Takashi Niwa、Takamitsu Hosoya
DOI:10.1021/acs.orglett.6b01250
日期:2016.6.3
Rhodium-catalyzed transformation of alkyl aryl sulfides into arylboronic acid pinacol esters via C–S bond cleavage is reported. In combination with transition-metal-catalyzed sulfanyl group-guided regioselective C–H borylation reactions of alkylthioarenes, this method allows the synthesis of a diverse range of multisubstituted arenes.