Synthesis of Quinolines via Rh(III)-Catalyzed Oxidative Annulation of Pyridines
作者:Guoyong Song、Xue Gong、Xingwei Li
DOI:10.1021/jo201266u
日期:2011.9.16
Selective synthesis of quinolines has been achieved via oxidative annulation of functionalized pyridines with two alkyne molecules under Rh(III)-catalyzed cascade C–H activation of pyridines using Cu(OAc)2 as an oxidant. The selectivity of this reaction is oxidant-dependent, particularly on the anion of the oxidant.
novel copper promoted synthesis of substituted quinolines from various benzylic azides and internal alkynes has been demonstrated. The reaction features a broad substrate scope, high product yields and excellent regioselectivity. In contrast to the known two-step process of acid promoted [4 + 2] cycloaddition reaction and oxidation, the present methodology allows the synthesis of quinolines in a single
Palladium-Catalyzed Intermolecular Three-Component Coupling of Organic Halides with Alkynes and Alkenes: Efficient Synthesis of Oligoene Compounds
作者:Kana Shibata、Tetsuya Satoh、Masahiro Miura
DOI:10.1002/adsc.200700171
日期:2007.10.8
intermolecular three-componentcoupling of aryl or vinyl halides, diarylacetylenes, and monosubstituted alkenes effectively proceeds in the presence of palladium acetate, lithium chloride, and sodium bicarbonate as catalyst, promoter, and base, respectively, in aqueous DMF or DMSO to produce the corresponding 1,3-butadiene or 1,3,5-hexatriene derivatives. Use of dienyl bromides allows the coupling to afford
作者:Nandini Sharma、Vijay Bahadur、Upendra K. Sharma、Debasmita Saha、Zhenghua Li、Yogesh Kumar、Jona Colaers、Brajendra K Singh、Erik V. Van der Eycken
DOI:10.1002/adsc.201800458
日期:2018.8.17
A microwave‐assisted highly efficient intermolecular C−H functionalization sequence has been developed to access substituted isoquinolones using α‐amino acid esters as a directing group. This methodology enables a wide range of N‐benzoyl α‐amino ester derivatives to react via a Ru‐catalysed C−H bond activation sequence, to form isoquinolones with moderate to excellent yields. As an additional advantage
Spiro[indene-1,4′-oxa-zolidinones] Synthesis via Rh(III)-Catalyzed Coupling of 4-Phenyl-1,3-oxazol-2(3<i>H</i>)-ones with Alkynes: A Redox-Neutral Approach
作者:Zhongsu Liu、Wenjing Zhang、Shan Guo、Jin Zhu
DOI:10.1021/acs.joc.9b01804
日期:2019.9.20
C-H activation synthesis of heterocyclic spiro[4,4]nonanes has persistently witnessed the use of additional stoichiometric transition-metal oxidant when employing C═C bond as the spiro ring closure site. Herein, we have addressed the issue by reporting a redox-neutral strategy for spiro[indene-1,4'-oxa-zolidinones] synthesis via Rh(III)-catalyzed coupling of 4-phenyl-1,3-oxazol-2(3H)-ones with alkynes