Conclusions
When piperazine, p-xylylenediamine and hexamethylenediamine are reacted with the imides of citraconic and maleic acids in the absence of moisture the amines add to the double bond of the imide rings. Two stereoisomeric diimides of the corresponding alkylenebisaspartic and methylbisaspartic acids are formed here.
Literature cited
T. V. Sheremeteva, G. S. Sharifov, K. A. Romashkova, E. F. Zazykina, and E. N. Zlobin, USSR Patent No. 229525, October 23, 1968; Byull. Izobr., No. 33 (1969).
T. V. Sheremeteva, G. S. Sharifov, E. F. Zazykina, and T. A. Kalinina, Izv. Akad. Nauk SSSR, Ser. Khim., 1137 (1970).
T. V. Sheremeteva and V. V. Kudryavtsev, Izv. Akad. Nauk SSSR, Ser. Khim., 289 (1966).
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 10, pp. 2294–2296, October, 1971.
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Sheremeteva, T.V., Kalinina, T.A., Sklizkova, V.P. et al. Synthesis of isomeric diimides of N,N′-alkylenebisaspartic and bismethylaspartic acids. Russ Chem Bull 20, 2164–2166 (1971). https://doi.org/10.1007/BF00851273
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DOI: https://doi.org/10.1007/BF00851273