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

Authors

  • Г. Д. Крапивин Kuban State Technological University, 350072 Krasnodar
  • H. И. Вальтер Kuban State Technological University, 350072 Krasnodar
  • B. E. Заводник Kuban State Technological University, 350072 Krasnodar
  • Д. Вегх Kuban State Technological University, 350072 Krasnodar
  • Л. Фишера Kuban State Technological University, 350072 Krasnodar
  • B. Г. Kульневич Kuban State Technological University, 350072 Krasnodar

Abstract

The corresponding 3-furfurylidene(thienylidene)-dioxanediones were obtained by the reaction of 2,5-R,R-furan(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.

How to Cite
Krapivin, G. D.; Val'ter, N. I.; Zavodnik, V. E.; Vegkh, D.; Fishera, L.; Kul'nevich, V. G. Chem. Heterocycl. Compd. 1995, 31, 782. [Khim. Geterotsikl. Soedin. 1995, 899.]

For this article in the English edition, see DOI https://doi.org/10.1007/BF01170736

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Published

1995-07-25

Issue

No. 7 (1995)

Section

Original Papers