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- W4241311221 abstract "Themal reaction of sodium crotonate in solid state was found to afford exclusively 1hexene-3, 4-dicarboxylic acid[1] in high yield. Sodium crotonate was heated at 300°C in solid state under vacuum for 4 h. The salt was dissolved in water, and the solution was acidified with HCl to recover crude crystals. Recrystallization of the product from water gave [1] (mp 185-486°C) in 84% yield. Hydrogenation of [1] in methanol solution in the presence of Pt-black yielded a product, of which, the melting point agreed with that reported for the meso-hexane-3, 4-dicarboxylic acid [3] (mp 192°C). The structure of [ 1 ] was elucidated by 1H-NMR and mass spectra of its methyl ester [2]. Refluxing of (2) at 240°C for 20 h, resulted in double bond migration to give dimethyl 2-hexene-3, 4-dicarboxylate consisting of (E)- [5 a] and (Z)- [5 b] forms in yields of 52% and 43%, respectively." @default.
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- W4241311221 date "1983-01-01" @default.
- W4241311221 modified "2023-09-26" @default.
- W4241311221 doi "https://doi.org/10.1246/nikkashi.1983.1291" @default.
- W4241311221 hasPublicationYear "1983" @default.
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