5-Alkylidene-hexahydro-1H-cyclopenta[c]pyrrol-1,3-diones by nickel(0) or palladium(0) catalyzed [3+2] cycloaddition of methylenecyclopropanes with maleimides
作者:Paul Binger、Andreas Freund、Petra Wedemann
DOI:10.1016/s0040-4020(01)80117-4
日期:1989.1
Nickel(0) catalyzed [3+2] cycloaddition of methylenecyclopropanes 1a - e with N-substituted maleimide 3b (R = CH3) and 3c (R = Ph) leads almost exclusively to the title compounds 6 and 7. The same reaction occurs in the presence of a palladium(0) catalyst with lower selectivity. Neither unsubstituted maleimide (3a) nor maleic anhydride (2a) undergo this metal catalyzed cycloaddition. With isopropylidenecyclopropane