Cycloaddition of C,C-Disubstituted Ketonitrones with Acceptor Methylenecyclopropanes and Subsequent Rearrangement Cascade of 5-Spirocyclopropane-isoxazolidines
作者:Tung Q. Tran、Vyacheslav V. Diev、Galina L. Starova、Vladislav V. Gurzhiy、Alexander P. Molchanov
DOI:10.1002/ejoc.201200039
日期:2012.4
A new reaction cascade to give tricyclic cores of 2,4-dihydro-1H-azeto[1,2-a]quinolines (benzocarbacephems) and pyrrolo[1,2-a]quinolines starting from acyclic N-aryl ketonitrones and acceptor ring substituted methylenecyclopropanes has been reported. This reaction includes 1,3-dipolar cycloaddition of N-aryl-C,C-diaryl or N-aryl-C,C-bis(methoxycarbonyl) nitrones 1 to the double bond of dimethyl me