Oxidative Annulations Involving DMSO and Formamide: K<sub>2</sub>S<sub>2</sub>O<sub>8</sub> Mediated Syntheses of Quinolines and Pyrimidines
作者:Santosh D. Jadhav、Anand Singh
DOI:10.1021/acs.orglett.7b02838
日期:2017.10.20
An efficient strategy toward 4-arylquinolines and 4-arylpyrimidines from readily available precursors is described. Oxidative annulationpromoted by K2S2O8 involving anilines, aryl ketones, and DMSO as a methine (═CH−) equivalent leads to 4-arylquinolines via a cascade that entails generation of a sulfenium ion, subsequent C–N and C–C bond formations, and cyclization. The application of this strategy
描述了从容易获得的前体制备4-芳基喹啉和4-芳基嘧啶的有效策略。K 2 S 2 O 8促进的涉及苯胺,芳基酮和DMSO的亚甲基(═CH-)等效的氧化环化反应通过级联反应生成4-芳基喹啉,该级联反应会生成generation离子,随后的C–N和C– C键的形成和环化。还描述了该策略在乙酰苯甲酰胺甲酰胺偶联物的活化中对4-芳基嘧啶合成的应用。
A novel substance capable of emitting phosphorescence is provided. An organometallic complex represented by General Fomulae (G3) or (G5). In the formulae, M represents iridium, platinum, palladium, or rhodium, R
1
represents a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 10 carbon atoms, and R
2
to R
7
separately represent hydrogen or a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms.
method for the conversion of pyrimidines into pyrazoles by a formal carbon deletion has been achieved guided by computational analysis. The pyrimidine heterocycle is the most common diazine in FDA-approved drugs, and pyrazoles are the most common diazole. An efficient method to convert pyrimidines into pyrazoles would therefore be valuable by leveraging the chemistries unique to pyrimidines to access diversified
requests via the RightsLink permission system: http://pubs.acs.org/page/copyright/permissions.html. This article has not yet been cited by other publications. The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/jacs.2c13180. Experimental procedures, characterization data, spectra for all new compounds, crystallographicdata and Cartesian coordinates of DFT-optimized