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- W2002217036 abstract "Novel 2,4-diazabicyclo[3.3.0]octane-3,7-diones (10) have been prepared by an intramolecular Michael-type cyclisation. The analogous 3-thioxo-2,4-diazabicyclo[3.3.0]octan-7-one system (20) is obtained by base catalysed retro-Michael reaction of the less stable 3-arylimino-2-this-4-azabicyclo[3.3.0]octan-7-one isomer (19). The 2-aza-4-oxabicyclo[3.3.0]octane-3,7-dione system (17) is shown to be very unstable to base, fragmenting via the carbamic acid to give carbon dioxide and a 4-N-substituted cyclopent-2-enone (11). The relative stability to base of these bicyclic systems is correlated with their structure." @default.
- W2002217036 created "2016-06-24" @default.
- W2002217036 creator A5045510469 @default.
- W2002217036 date "1980-01-01" @default.
- W2002217036 modified "2023-09-23" @default.
- W2002217036 title "Synthesis of 2,4-diazabicyclo[3.3.0]octane-3,7-diones and 3-thioxo-2,4-diazabicyclo[3.3.0]octan-7-one by an intramolecular Michael-type reaction. Stability of 2,4-diaza-, 4-oxa-2-aza-, and 4-thia-2-aza-bicyclo[3.3.0]octane-3,7-diones" @default.
- W2002217036 doi "https://doi.org/10.1039/p19800002497" @default.
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