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Spectroscopic evidence for the existence of cyclic diethylmalonic anhydride

✍ Scribed by G. Resofszki; M. Huhn; B. Hegedüs; P. Dvortsák; K. Kálóy

Publisher
Elsevier Science
Year
1975
Tongue
French
Weight
175 KB
Volume
16
Category
Article
ISSN
0040-4039

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✦ Synopsis

Up to the present, attempts to isolate compounds having a cyclic oxetane-2,4-dione /malonic anhydride l_/.structure or to prove unambiguously their structure have been unsuccessful.

Ylronova and Dvorko' reported the conversion of succinic, glutario, phthalic and maleio acids with dioyclohexyl oarbodiimide /DCC/ Into cyollo anhydrides and dlcyolohexyl urea /DCU/. According to our experience 3 the derivatives of malonlc acid also react at first in this way but the malonic anhydride formed reacts instantaneously with another DCC molecule or polymerizes. Though Duckworth described the preparation of compounds having a cyclic malonic an&dride structure, the IR bands specified by him /at 1824 and 1780 cm"/ are inconsistent with the four-membered ring structure, they may be assigned rather to its dimer of structure 2.

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