Three-Component One-Pot Synthesis of Unsymmetrical Diarylalkynes by Thermocontrolled Sequential Sonogashira Reactions Using Potassium Ethynyltrifluoroborate
作者:Taejung Kim、Kyu Hyuk Jeong、Youngseok Kim、Taesub Noh、Jaeyoung Choi、Jungyeob Ham
DOI:10.1002/ejoc.201700110
日期:2017.5.3
Sonogashira reactions with potassium ethynyltrifluoroborate and two different reactive aryl halides. The one-pot procedure was initiated by the palladium/copper-catalyzed Sonogashira coupling of potassium ethynyltrifluoroborate to an aryliodide or electron-deficient aryl bromide at 40 °C. Following a subsequent deboronative Sonogashira reaction of the in situ generated potassium (arylethynyl)trifluoroborate
<i>N</i>-Heterocarbene Palladium Complexes with Dianisole Backbones: Synthesis, Structure, and Catalysis
作者:Dong-Hui Li、Xu-Xian He、Chang Xu、Fei-Dong Huang、Ning Liu、Dong-Sheng Shen、Feng-Shou Liu
DOI:10.1021/acs.organomet.9b00230
日期:2019.6.24
C1–C5, bearing dianisole backbones and substituted N-aryl moieties have been synthesized and characterized. The electronic effect as well as the steric environment of the NHC ligands has been assessed. The synthesized palladium complexes were applied for Suzuki–Miyaura cross-coupling reactions under aerobic conditions. The relationship between the catalytic structure and catalytic performance was then
An efficient water-soluble surfactant-type palladium catalyst for Suzuki cross-coupling reactions in pure water at room temperature
作者:Pei Qiu、Jing Yang Zhao、Xu Shi、Xin Hong Duan
DOI:10.1039/c6nj00377j
日期:——
An in situ-generated Pd catalyst with a bidentate phosphine-type zwitterionic surfactant as a ligand showed high catalytic activity in the Suzuki reactions.
一个以双齿膦型带电离表面活性剂为配体的原位生成的Pd催化剂在Suzuki反应中表现出高催化活性。
Accessing a Biologically Relevant Benzofuran Skeleton by a One-Pot Tandem Heck Alkynylation/Cyclization Reaction Using Well-Defined Palladium N-Heterocyclic Carbene Complexes
作者:Anuj Kumar、Manoj Kumar Gangwar、A. P. Prakasham、Darshan Mhatre、Alok Ch. Kalita、Prasenjit Ghosh
DOI:10.1021/acs.inorgchem.5b02727
日期:2016.3.21
successfully catalyzed the one-pot tandem Heck alkynylation/cyclization reaction of 2-iodophenol with a variety of terminal alkyne substrates, yielding 2-substituted benzofuran derivatives. The mononuclear complexes 3b and 3c were nearly half as active as the representative dinuclear analogue 1c under analogous reaction conditions, thereby implying that, at the same mole percent of the palladium loading
O‐Aryloximes, generated from readily available and inexpensive oximes through transition‐metal‐free O‐arylation, can either be hydrolyzed to O‐arylhydroxylamines or conveniently converted to structurally diverse benzo[b]furans through an environmentally benign, one‐pot [3,3]‐sigmatropic rearrangement/cyclization sequence.
通过无过渡金属的O-芳基化反应从廉价和廉价的肟中生成的O-芳基肟可以水解为O-芳基羟胺,也可以通过对环境有益的单锅[3]方便地转化为结构多样的苯并[ b ]呋喃。 ,3]-σ重排/环化序列。