Conclusions
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1.
On electrolysis in methanol in the presence of the catalyst carrier NaI, tetramethyl propane-1,1,3,3-tetracarboxylate cyclizes with the exclusive formation of tetramethyl cyclopropane-1,1,2,2-tetracarboxylate with the yield up to 98%.
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2.
In the presence of NaBr and LiCl, hexamethyl pentane-1,1,3,3,5,5-hexacarboxylate, hexamethyl cyclopentane-1,1,2,2,4,4-hexacarboxylate, and tetramethyl tetrahydrofuran-2,2,4,4-tetracarboxylate are also formed; the last may be obtained with the yield up to 60%.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 7, pp. 1603–1608, July, 1989.
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élinson, M.N., Fedukovich, S.K., Lindeman, S.V. et al. Electrochemical cyclization of the tetramethyl ester of propane-1,1,3,3-tetracarboxylic acid in the presence of salts of hydrogen halides. Russ Chem Bull 38, 1467–1471 (1989). https://doi.org/10.1007/BF00978439
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DOI: https://doi.org/10.1007/BF00978439