Palladium-Catalyzed Multialkynyl Cross-Coupling Reactions with Tetraalkynylindates
作者:Dongjin Kang、Dahan Eom、Hyunseok Kim、Phil Ho Lee
DOI:10.1002/ejoc.201000027
日期:2010.4
Pd-catalyzed multialkynylcross-couplingreaction performed with tetraalkynylindates generated in situ from the reaction of 1 equiv. of indium trichloride with 4 equiv. of organometallic reagents has been developed to produce symmetric as well as unsymmetric multialkynyl-substituted aromatic compounds in good-to-excellent yields. In these reactions, the four acetylide groups in the tetraalkynylindates transferred
Palladium-catalyzed Sonogashira coupling reactions in γ-valerolactone-based ionic liquids
作者:László Orha、József M Tukacs、László Kollár、László T Mika
DOI:10.3762/bjoc.15.284
日期:——
that the γ-valerolactone-based ionic liquid, tetrabutylphosphonium 4-ethoxyvalerate as a partially bio-based solvent can be utilized as alternative reaction medium for copper- and auxiliary base-free Pd-catalyzed Sonogashiracoupling reactions of aryl iodides and functionalized acetylenes under mild conditions. Twenty-two cross-coupling products were isolated with good to excellent yields (72-99%) and
Nickel nanoparticles supported on reduced graphene oxide sheets: a phosphine free, magnetically recoverable and cost effective catalyst for Sonogashira cross-coupling reactions
作者:Najrul Hussain、Pranjal Gogoi、Puja Khare、Manash R. Das
DOI:10.1039/c5ra22601e
日期:——
synthesis of a heterogeneous catalyst consisting of a Ni nanoparticle–reduced graphene oxide composite for Sonogashiracross-couplingreactions. Several characterization tools were employed to characterize the Ni nanoparticle–reduced graphene oxide composite, which indicated that magnetic Ni nanoparticles of a size range of 1–4 nm were uniformly anchored on the reduced graphene oxide nanosheets without
A facile protocol for copper‐free palladium‐catalyzed Sonogashira coupling in aqueous media
作者:Da‐Young Jung、Soo Youl Park、Seung‐Hoi Kim
DOI:10.1002/bkcs.12432
日期:2022.1
combination of a readily available palladiumcatalyst and an eco-friendly basic aqueous solution of room-temperature ionic liquid, choline hydroxide (ChOH), was used in a facile protocol alternative to the Sonogashiracoupling reaction, alkynylation of aryl halides in the absence of a copper cocatalyst and an external base. The dual nature of ChOH to act as a base and a green solvent played a crucial role in
Direct preparation of arylethynylzinc bromides and their application to cross-coupling reactions
作者:Seong-Ryu Joo、Jong-Sung Kim、Seung-Hoi Kim
DOI:10.1016/j.tetlet.2017.07.020
日期:2017.8
A novel synthetic protocol for the preparation of arylethynylzinc bromides has been developed. Thus-obtained organozinc reagents were successfully employed in the subsequent cross-couplingreactions with a broad range of aryl halides providing the corresponding alkynylated compounds in good to excellent yields.