Conclusions
1. Five heterocyclic compounds have been obtained for the first time and characterized: diethylenebis-(1-pyrazolinium-3-oxide) (III); p-phenylene-bis-(5-pyrazolidone-3) (IV); 1,2-dimethylene-bis-(1-pyrazolidone-3) (Va); 1,6-hexamethylene-bis-(1-pyrazolidone-3) (Vb); methyl ester of 1,6-methylene-bis-(1-pyrazolidone-3)-5-p-phenyleneacrylic acid (VI), and also the dimethylhydrazides of p-phenylenediacrylic and muconic acids.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 9, pp. 2082–2085, September, 1970.
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Zapevalova, N.P., Ovsyannikova, L.A., Martyakova, N.I. et al. New heterocyclic compounds containing two pyrazolidone rings. Russ Chem Bull 19, 1955–1958 (1970). https://doi.org/10.1007/BF00849780
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DOI: https://doi.org/10.1007/BF00849780