We have developed a simple and direct method for the synthesis of arylethers by reacting alcohols/phenols (ROH) with aryl ammonium salts (ArNMe3+), which are readily prepared fromanilines (ArNR′2, R′=H or Me). This reaction proceeds smoothly and rapidly (within a few hours) at room temperature in the presence of a commercially available base, such as KOtBu or KHMDS, and has a broad substrate scope
Exploiting Ancillary Ligation To Enable Nickel-Catalyzed C–O Cross-Couplings of Aryl Electrophiles with Aliphatic Alcohols
作者:Preston M. MacQueen、Joseph P. Tassone、Carlos Diaz、Mark Stradiotto
DOI:10.1021/jacs.8b01800
日期:2018.4.18
The use of (L)Ni( o-tolyl)Cl precatalysts (L = PAd-DalPhos or CyPAd-DalPhos) enables the C( sp2)-O cross-coupling of primary, secondary, or tertiary aliphatic alcohols with (hetero)aryl electrophiles, including unprecedented examples of such nickel-catalyzed transformations employing (hetero)aryl chlorides, sulfonates, and pivalates. In addition to offering a competitive alternative to palladium catalysis
One-pot synthesis of tertiary alkyl fluorides from methyl oxalates by radical deoxyfluorination under photoredox catalysis
作者:Julien Brioche
DOI:10.1016/j.tetlet.2018.10.063
日期:2018.12
Tertiary alkyl fluorides have been prepared from methyl oxalates derived from tertiary alcohols by a sequential one-pot hydrolysis/photoredox catalyzed radical deoxyfluorination sequence. The reaction operates under mild conditions and tolerates a wide range of functional groups. This method provides an alternative approach to ionic deoxyfluorination transformations for the incorporation of Carbone–Fluorine