Michael Additions in Aqueous Media: “On-Water” and “In-Water” Processes from α-Nitro Ketones and Their Anions
作者:Giorgio Giorgi、Pilar López-Alvarado、Sonia Miranda、Jean Rodriguez、J. Carlos Menéndez
DOI:10.1002/ejoc.201201431
日期:2013.3
A variety of α,β-unsaturatedaldehydes and ketones gave very high-yielding Michael addition reactions with α-nitrocycloalkanones in water, at room temperature without added catalyst. These can be considered as one of the very few “on-water” Michael reactions known in the literature, because they took place in suspension or emulsion and at increased speed relative to the same transformations performed
Practical and User-Friendly Procedure for Michael Reactions of α-Nitroketones in Water
作者:J. Carlos Menéndez、Sonia Miranda、Pilar López-Alvarado、Giorgio Giorgi、Jean Rodriguez、Carmen Avendaño
DOI:10.1055/s-2003-42096
日期:——
A variety of α,β-unsaturated carbonyl derivatives gave selective Michael additions with several α-nitrocycloalkanones in water, at room temperature without any added catalyst, or in very dilute, aqueous solutions of potassium carbonate. Both preparative methods constitute new, environmentally benign and more efficient alternatives to previous procedures.
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.
Deacylative Allylation of Nitroalkanes: Unsymmetric Bisallylation by a Three-Component Coupling
作者:Alexander J. Grenning、Jon A. Tunge
DOI:10.1002/anie.201006273
日期:2011.2.11
Use it and lose it! Allylic alcohols were used directly for the synthesis of diallylated nitroalkanes in a three‐component coupling based on the strategy of deacylativeallylation for the in situ generation of a nucleophile and an allyl electrophile (see scheme).
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