Archiv der Pharmazie p. 537 - 545 (1986)
Update date:2022-08-30
Topics:
Fritsch
Zinner
Ernst
Both rings of 1,5-diazabicyclo[3.3.0]octane-2,4,6,8-tetrone (1) are split in hot ethanol yielding 4, the structure of which was proven by 15N-NMR spectroscopy. 3,7-Diethyl-(1) and 3-ethyl-(1) show the same behavior. However, the latter yields a mixture of the expected product 12 and 4-ethylpyrazolidine-3,5-dione (13). Under the same conditions, only the unsubstituted ring is split in 3,3-diethyl-(1) leading to 1-ethoxycarbonylacetyl-4,4-diethyl-3,5-pyrazolidinedione (8).
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Doi:10.1007/s11164-015-2198-8
(2016)Doi:10.1134/S1070428019050191
(2019)Doi:10.1021/jm030378i
(2004)Doi:10.1002/tt.3020060302
(1913)Doi:10.1107/S0108270199005284
(1999)Doi:10.1039/DF9480400174
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