Convenient synthesis of 4,5-unsubstituted 3-aroylisoxazoles from methyl aryl ketones and (vinylsulfonyl)benzene in water
作者:Liang Wang、Yu Tao、Nana Zhang、Shubai Li
DOI:10.1016/j.tetlet.2020.152739
日期:2021.2
A convenientsynthesis of 3-aroylisoxazoles from methyl ketones and (vinylsulfonyl)benzene in 2%TPGS-750-M/H2O has been developed. This reaction proceeds via tandem tert-butyl nitrite-promoted Csp3-H functionalization of methyl ketones, 1,3-dipolar cycloaddition and base-catalyzed aromatization, providing the corresponding products in moderate to good yields.
已经开发了在2%TPGS-750-M / H 2 O中由甲基酮和(乙烯基磺酰基)苯方便地合成3-芳基异恶唑的方法。该反应通过亚甲基串联叔丁基亚硝酸盐促进的Csp 3 -H官能化,1,3-偶极环加成和碱催化的芳构化进行,从而以中等至良好的产率提供相应的产物。
General Allylic C–H Alkylation with Tertiary Nucleophiles
作者:Jennifer M. Howell、Wei Liu、Andrew J. Young、M. Christina White
DOI:10.1021/ja500726e
日期:2014.4.16
A general method for intermolecular allylic C–H alkylation of terminal olefins with tertiary nucleophiles has been accomplished employing palladium(II)/bis(sulfoxide) catalysis. Allylic C–H alkylation furnishes products in good yields (avg. 64%) with excellent regio- and stereoselectivity (>20:1 linear:branched, >20:1 E:Z). For the first time, the olefin scope encompasses unactivated aliphatic olefins
A new synthesis of 1,5-dicarbonyl compounds under neutral conditions
作者:Noboru Ono、Hideyoshi Miyake、Aritsune Kaji
DOI:10.1039/c39830000875
日期:——
Michael addition of α-nitroketones to methyl vinyl ketone or acrylaldehyde followed by denitration with Bu3SnH affords 1,5-dicarbonylcompounds in good yields.
A novel one pot synthesis of α-nitroketones from olefins using trimethylsilylnitrate-chromium trioxide reagent system
作者:M. Venkat Ram Reddy、R. Kumareswaran、Yashwant D. Vankar
DOI:10.1016/0040-4039(95)01421-d
日期:1995.9
A variety of α-nitroketones have been obtained from the corresponding olefins in good yields upon reaction with trimethylsilylnitrate-chromium trioxide reagentsystem.
在与三甲基甲硅烷基硝酸盐-三氧化铬试剂体系反应后,从相应的烯烃以高收率获得了多种α-硝基酮。
α-Nitration of Ketones <i>via</i> Enol Silyl Ethers. Radical Cations as Reactive Intermediates in Thermal and Photochemical Processes
作者:Rajendra Rathore、Jay K. Kochi
DOI:10.1021/jo9515687
日期:1996.1.1
silyl ether (ESE) to TNM results in the radical ion triad [ESE(*)(+), NO(2)(*), C(NO(2))(3)(-)]. A subsequent fast homolytic coupling of the cation radical of the enol silyl ether with NO(2)(*)() leads to the alpha-nitro ketones. The use of time-resolved spectroscopy and the disparate behavior of the isomeric enol silyl ethers of alpha- and beta-tetralones as well as of 2-methylcyclohexanone strongly