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- Title
Five-membered 2,3-dioxo heterocycles: XCII. Reaction of 3-aroyl-1 H-pyrrolo[2,1- c][1,4]benzoxazine-1,2,4-triones with ethyl (2 Z)-(3,3-dimethyl-8-oxo-2-azaspiro[4.5]deca-6,9-dien-1-ylidene)ethanoate. Synthesis of bridged analogs of pyrrolizidine alkaloids
- Authors
Konovalova, V.; Stryapunina, O.; Shklyaev, Yu.; Slepukhin, P.; Maslivets, A.
- Abstract
3-Aroyl-1 H-pyrrolo[2,1- c][1,4]benzoxazine-1,2,4-triones reacted with ethyl (2 Z)-(3,3-dimethyl-8-oxo-2-azaspiro[4.5]deca-6,9-dien-1-ylidene)acetate to give ethyl 6′-aryl-2′-(2-hydroxyphenyl)-11′,11′-dimethyl-3′,4,4′,13′-tetraoxospiro[2,5-cyclohexadiene-1,9′-(7′-oxa-2′,12′-diazatetracyclo[6.5.1.0.0]tetradec-5′-ene)]-14′-carboxylates whose structure was confirmed by X-ray analysis. The products may be regarded as bridged analogs of pyrrolizidine alkaloids, 7′-oxa-2′,12′-diazatetracyclo[6.5.1.01,5.08,12]tetradecanes.
- Subjects
BENZOXAZINES; PYRROLIZIDINES; CHEMICAL synthesis; CARBOXYLATES; ALKALOIDS; TETRADECANE
- Publication
Russian Journal of Organic Chemistry, 2013, Vol 49, Issue 2, p268
- ISSN
1070-4280
- Publication type
Article
- DOI
10.1134/S1070428013020140