SCHEDULED MAINTENANCE
Dimethylketen and diphenylketen form 2 : 1 cycloadducts with 2,3-diazabicyclo[2.2.1]hept-2-ene (3), the former adduct being isolated only as its hydrolysis product. The diphenylketen adduct is shown to have the structure (5b). Compound (3) failed to react with dimethylketen in methanolic solution but (Z)-azobenzene reacted in methanol with both dimethylketen and keten to give only diazetidinones.
G. Brooks, M. A. Shah and G. A. Taylor, J. Chem. Soc., Perkin Trans. 1, 1973, 1297 DOI: 10.1039/P19730001297
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