Palladium‐Catalyzed Decarboxylative Alkynylation of α‐Acyloxyketones by C(sp
<sup>3</sup>
)−O Bond Cleavage
作者:Ryohei Doi、Akimasa Yabuta、Yoshihiro Sato
DOI:10.1002/chem.201900582
日期:2019.4.23
Palladium‐catalyzeddecarboxylativealkynylation of α‐acyloxyketones triggered by C(sp3)−Obondcleavage is disclosed. The decarboxylation strategy featuring a neutral reaction condition enabled an unprecedent catalytic alkynylation of a ketone enolate. The reaction was applied to a variety of substrates, giving desired products in good yields. We successfully obtained X‐ray crystallography of a new
Photochemical (Hetero-)Arylation of Aryl Sulfonium Salts
作者:Yue Zhao、Congjun Yu、Wenjing Liang、Frederic W. Patureau
DOI:10.1021/acs.orglett.1c01904
日期:2021.8.20
report a simple photoinduced and catalyst-free C–H/C–H (hetero)arylation cross-coupling through aryl thianthrenium salts, which are formed site-selectively by direct C–H functionalization. The key to this approach is the UV-light, which can disrupt the C–S bond to form thianthrene radical cations and aryl radicals.
Cross-Coupling Knows No Limits: Assessing the Synthetic Potential of the Palladium-Catalysed Cross-Coupling of Organolithiums
作者:James D. Firth、Peter O'Brien
DOI:10.1002/cctc.201402886
日期:2015.2
Organolithiums have passed the test! Previously considered too reactive and unstable, organolithiums have been tamed and can now participate successfully in palladium‐catalysed cross‐coupling with aryl/vinyl bromides and triflates.
Catalytic Direct Cross-Coupling of Organolithium Compounds with Aryl Chlorides
作者:Valentín Hornillos、Massimo Giannerini、Carlos Vila、Martín Fañanás-Mastral、Ben L. Feringa
DOI:10.1021/ol402408v
日期:2013.10.4
Palladium-catalyzed direct cross-coupling of aryl chlorides with a wide range of (hetero)aryl lithium compounds is reported. The use of Pd-PEPPSI-IPent or Pd2(dba)3/XPhos as the catalyst allows for the preparation of biaryl and heterobiaryl compounds in high yields under mild conditions (room temperature to 40 °C) with short reaction times.
synthesis of 2-substitutedfurans via palladium- and iron-catalyzed coupling utilizing 2-bromofuran is described. Whereas palladium-catalyzed Suzuki coupling effectively provided the corresponding aryl furans, little or no product was obtained by palladium-catalyzed coupling with various alkyl nucleophiles. Iron-catalyzed coupling proved effective for the synthesis of primary and secondary alkyl furans in modest