Suzuki–Miyaura Cross-Coupling of Heteroaryl Halides and Arylboronic Acids in Continuous Flow
作者:Timothy Noël、Andrew J. Musacchio
DOI:10.1021/ol202052q
日期:2011.10.7
General continuous-flow conditions for the Suzuki–Miyauracross-coupling of heteroaryl halides and (hetero)arylboronicacids have been developed. A wide range of heterobiaryl products is obtained in excellent yields (20 examples) employing low catalyst loadings (0.05–1.5 mol % Pd).
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。
Selective Halogenation of Pyridines Using Designed Phosphine Reagents
作者:Jeffrey N. Levy、Juan V. Alegre-Requena、Renrong Liu、Robert S. Paton、Andrew McNally
DOI:10.1021/jacs.0c04674
日期:2020.6.24
metal complexes, but strategies to selectively halogenate pyridine C-H precursors are lacking. We designed a set of heterocyclic phosphines that are installed at the 4-position of pyridines as phosphonium salts and then displaced with halide nucleophiles. A broad range of unactivated pyridines can be halogenated, and the method is viable for late-stage halogenation of complex pharmaceuticals. Computational
Direct Construction of Julolidines via Reductive Annulation of Quinolines and Conjugated Enones by a MOF-Derived Hierarchically Porous Iridium Catalyst
ZrO2-supported iridium catalyst (Ir-N@HP-mesoZrO2), featuring sufficient accessible catalytic sites even with ultralow iridium loading. Such a catalyst was successfully applied to selective and direct construction of julolidines via catalytic reductive annulation of readily available quinolines and conjugated enones, proceeding with good substrate and functional group compatibility, reusable catalyst, high step
Benzo-fused tri- to heptacyclic heteroarenes were effectively constructed by the rhodium-catalyzed dehydrogenative coupling of phenylheteroarenes with alkynes. Using alkenes as coupling partners, dehydrogenative alkenylation took place selectively on the phenyl moiety of phenylheteroarenes. Several experiments with deuterium-labeled substrates indicated that double C-H bond cleavages take place even in the reaction with alkenes.