Aliphatic nitro groups are replaced by hydrogen on treatment with tributyltin hydride which proceeds via freeradical chain processes. As the nitro group is selectively denitrated and other reducible groups are not affected with tributyltin hydride, this reaction can be used as a method for removing the nitro group from polyfunctional compounds. The radical intermediates generated via denitration can
Synthesis of β-Functionalized α,β-Unsaturated Oximes via Silylation of Nitro Compounds
作者:Vitaly M. Danilenko、Alexander A. Tishkov、Sema L. Ioffe、Ilya M. Lyapkalo、Yury A. Strelenko、Vladimir A. Tartakovsky
DOI:10.1055/s-2002-23539
日期:——
A general method for the synthesis of conjugated enoximes 2 via silylation of functionalized aliphatic nitrocompounds 1 has been claborated. The configuration of obtained products has been determined by NMR spectroscopy.
Solvent-Free Henry and Michael Reactions with Nitroalkanes Promoted by Potassium Carbonate as a Versatile Heterogeneous Catalyst
作者:Giovanna Bosica、Kurt Polidano
DOI:10.1155/2017/6267036
日期:——
The use of a simple weak inorganicbase such as potassium carbonate facilitated the formation of carbon-carbon bonds through both the Henry and the Michael reactions with nitrocompounds. The application of this catalyst under environmentally friendly solventless heterogeneous conditions gave satisfactory to good yields of β-nitroalcohols, involving aliphatic and aromatic starting materials, as well
A diastereo- and enantioselective propargylic substitution reaction between propargylic carbonates and α-substituted nitroacetates catalyzed by a Cu-pybox complex is described. This method allows the preparation of a series of non-proteinogenic quaternary α-aminoacid precursors featuring two contiguous stereogenic centers and a terminal alkyne moiety in high yields with good to excellent diastereo-
Synthesis of α-nitro derivatives of δ-oxocarboxylic and glutaric acids in heterogeneous catalytic system ionic liquid—KHCO3
作者:S. G. Zlotin、G. V. Kryshtal、G. M. Zhdankina、A. V. Bogolyubov、S. G. Postikova、V. A. Tartakovsky
DOI:10.1007/s11172-007-0230-x
日期:2007.8
An expedient method for the synthesis of α-nitro-δ-oxocarboxylic and α-nitroglutaric acid esters, including ones with isoprenoid substituents, by the solvent-free reaction of the corresponding alkyl α-nitrocarboxylates with activated olefins, assisted by heterogeneous catalytic system KHCO3—1-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF4]), was elaborated. The product yields remain stable