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• W2907278350 endingPage "1161" @default.
• W2907278350 startingPage "1154" @default.
• W2907278350 abstract "A facile synthesis of highly functionalized spirobutenolides was carried out by a nitroalkane carbanion-induced ring opening and relactonization via a denitration reaction of 2-oxo-5,6-dihydro-2H-benzo[h]chromene-3-carbonitriles and 2-oxo-2,5-dihydrothiochromeno[4,3-b]pyran-3-carbonitriles. However, when nitroethane was used as a nucleophile source in lieu of nitromethane, a mixture of (E)- and (Z)-isomers of the corresponding spirobutenolides was obtained in a different ratio. The structure and geometry of the product were confirmed by single-crystal X-ray diffraction. The isolated (E)- and (Z)-butenolides with the treatment with sodium ethoxide in DMF at room temperature provided highly substituted trienes via an allylic ring opening followed by decarboxylation." @default.
• W2907278350 created "2019-01-11" @default.
• W2907278350 creator A5010987892 @default.
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• W2907278350 date "2019-01-04" @default.
• W2907278350 modified "2023-09-27" @default.
• W2907278350 title "Synthesis of Highly Functionalized Spirobutenolides via a Nitroalkane-Mediated Ring Contraction of 2-Oxobenzo[<i>h</i>]chromenes through Denitration" @default.
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• W2907278350 doi "https://doi.org/10.1021/acs.joc.8b02257" @default.
• W2907278350 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30652867" @default.
• W2907278350 hasPublicationYear "2019" @default.
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