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2,2-dimethyl-5-(5-r-furfurylidene)-1,3-dioxane4,6 diones 7. Synthesis, structure, and properties of 2,2dimethyl-5-(3-furfuryldiene and 3-thienylidene)-1,3dioxane-4,6-diones

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Abstract

The corresponding 3 furfurylidene(thienylidene)-dioxanediones were obtained by the reaction of 2,5-R,Rfuran(thiophen)-3-carbaldehydes with Meldrum's acid. It was shown by x-ray crystallographic analysis that they have the s-trans disposition at the C(2)=C(3) bond of the five-membered heterocycle and an exocyclic multiple bond. The character of the conjunction in their molecules was considered in the light of data of x-ray crystallographic analysis, electronic spectra, and NMR. The corresponding 3-furfuryl(thienyl)]dioxanediones were obtained by the selective ionic hydrogenation of the exocyclic double bond.

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References

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Authors
  1. G. D. Krapivin
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  2. N. I. Val'ter
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  3. V. E. Zavodnik
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  4. D. Vegkh
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  5. L. Fishera
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  6. V. G. Kul'nevich
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Additional information

For part 6 see [1]

Kuban State Technological University, Krasnodar 350072. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 7, pp. 899–905, July, 1995. Original article submitted October 25, 1994; revision submitted June 5, 1995.

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Krapivin, G.D., Val'ter, N.I., Zavodnik, V.E. et al. 2,2-dimethyl-5-(5-r-furfurylidene)-1,3-dioxane4,6 diones 7. Synthesis, structure, and properties of 2,2dimethyl-5-(3-furfuryldiene and 3-thienylidene)-1,3dioxane-4,6-diones. Chem Heterocycl Compd 31, 782–787 (1995). https://doi.org/10.1007/BF01170736

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  • DOI: https://doi.org/10.1007/BF01170736

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