Allylation of aldehydes via Umpolung of π-allylpalladium(II) with triethylborane
摘要:
Triethylborane induces allylic substrates (benzoates, phenyl ethers, benzyl ethers, but not halides) to undergo allylation of aldehydes in the presence of a catalytic amount of tetrakis(triphenylphosphine)palladium(0) The reaction proceeds via Umpolung of pi-allylpalladium. (C) 1999 Elsevier Science Ltd. All rights reserved.
Aerobic Acyloxylation of Allylic C−H Bonds Initiated by a Pd
<sup>0</sup>
Precatalyst with 4,5‐Diazafluoren‐9‐one as an Ancillary Ligand
作者:Caitlin V. Kozack、Jennifer A. Sowin、Jonathan N. Jaworski、Andrei V. Iosub、Shannon S. Stahl
DOI:10.1002/cssc.201900727
日期:2019.7.5
Palladium‐catalyzedallylicC−H oxidation has been widely studied, but most precedents use acetic acid as the coupling partner. In this study, a method compatible with diverse carboxylic acid partners has been developed. Use of a Pd0 precatalyst under aerobic reaction conditions leads to oxidation of Pd0 by O2 in the presence of the desired carboxylic acid to generate a PdII dicarboxylate that promotes