Regioselective Borylation of the C–H Bonds in Alkylamines and Alkyl Ethers. Observation and Origin of High Reactivity of Primary C–H Bonds Beta to Nitrogen and Oxygen
作者:Qian Li、Carl W. Liskey、John F. Hartwig
DOI:10.1021/ja503676d
日期:2014.6.18
Borylation of aliphatic C-H bonds in alkylamines and alkyl ethers to form primary aminoalkyl and alkoxyalkyl boronate esters and studies on the origin of the regioselectivity of these reactions are reported. The products of these reactions can be used directly in Suzuki-Miyaura cross-coupling reactions or isolated as air-stable potassium trifluoroborate salts. Selective borylation of the terminal C-H
Iridium-Catalyzed sp<sup>3</sup> C–H Borylation in Hydrocarbon Solvent Enabled by 2,2′-Dipyridylarylmethane Ligands
作者:Margaret R. Jones、Caleb D. Fast、Nathan D. Schley
DOI:10.1021/jacs.0c00524
日期:2020.4.8
Iridium-catalyzed alkane C-H borylation has long suffered from poor atom economy, resulting both from inclusion of only a single boron equivalent from the diboron reagent and a requirement for neat substrate. Appropriately-substituted dipyridylarylmethane ligands are found to give highly active alkane borylation catalysts which facilitate C-H borylation with improved conversion efficiency. This system provides for