Improved synthesis of γ-lactones from cyclopropyl cyanoesters
Cyclopropyl cyanoesters 2 were reliably converted to c-lactones 4 on treatment with aqueous sulfuric acid. The cyanoesters could be easily prepared from ketones or aldehydes in two steps, making this process particularly attractive from an efficiency standpoint. Copyright
Patel, Nandini C.,Schwarz, Jacob B.,Islam, Khondaker,Miller, Whitney,Tran, Tuan P.,Wei, Yunjing
experimental part
p. 2209 - 2215
(2011/07/07)
Synthetic applications of the [2+2] cycloaddition products of ketene alkylsilylacetals with acrylonitrile
2-Cyanocyclobutane alkylsilylacetals, obtained by a [2+2] cycloaddition reaction of ketene alkylsilylacetals and acrylonitrile, have allowed the synthesis of 2-cyanoclobutanones, 4-chloro-4-cyanobutanoates and 4-cyanobutanoates by respectively acidic cata
Rousseau,Quendo
p. 6361 - 6370
(2007/10/02)
Protolysis of Cyclopropanes with Geminal Electronegative Substituents
Cyclopropanes with geminal ester substituents decompose in anhydrous HClO4/benzene solutions to give substituted γ-lactones; e.g. dimethyl 3,3-dimethyl-2-phenylcyclopropane-1,1-dicarboxylate (1e) is stereospecifically transformed to trans-γ,γ-dimethyl-α-m
Kolsaker, Per,Jensen, Ann Kristin
p. 345 - 353
(2007/10/02)
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