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Decarboxylation in proton acceptor solvents

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Chemistry of Heterocyclic Compounds Aims and scope

Abstract

Heating 3,8-dinitro-10-carboxy-6H-dibenzo[b,d]pyran-6-one in DMSO, DMF, or HMPTA leads to decarboxylation and the replacement of the carboxyl group by a hydroxy group with the formation of 3,8-dinitro-6H-dibenzo[b,d]pyran-6-one and 3,8-dinitro-10-hydroxy-6H-dibenzo [b,d]pyran-6-one. The decarboxylation of 2,7-dinitro-5,10-dioxo-4,5,9,10-tetrahydro-4,9-dioxapyrene in HMPTA is preceded by opening of the two lactone rings and the formation of a 1:4 molecular complex of 4,4′-dinitro-6,6′-dihydroxy-2,2′-dicarboxybiphenyl with HMPTA, whose structure was established by x-ray diffraction structural analysis.

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Translated from Khimiya Geterotsiklicheskik Soedinenii, No. 2, pp. 164–170, February, 1989.

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Andrievskii, A.M., Poplavskii, A.N., Grekhova, N.G. et al. Decarboxylation in proton acceptor solvents. Chem Heterocycl Compd 25, 128–133 (1989). https://doi.org/10.1007/BF00479903

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  • DOI: https://doi.org/10.1007/BF00479903

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