Oxidative kupplung von 1,2-dienen mit isocyanaten am lig-nickel(0)-system
作者:Heinz Hoberg、Klaus Sümmermann
DOI:10.1016/0022-328x(84)85058-5
日期:1984.10
Isocyanates undergo a 1/1 oxidative coupling reaction with 1,2-dienes and Lig-Ni0 systems to give azanickelacyclopentanones. The coupling to form the nickela complexes proceeds in such a way that the exo-methylene group is conjugated with the carbonyl group. The influence of the ligands and the temperature on the regioselectivity of the CC coupling is reported.
3-Alkylidenesuccinimides obtained by conjugate addition of nitroalkanes to N-substituted maleimides can be reduced to the corresponding 3-alkyl derivatives by catalytic hydrogenation. 3-Alkylsuccinimides can be further reduced using BH3·Me2S complex to afford 3-alkylpyrrolidines in good yield.