Cooperative Catalysis for the First Asymmetric Formal [3+2] Cycloaddition Reaction of Isocyanoacetates to α,β-Unsaturated Ketones
作者:Carlos Arróniz、Alberto Gil-González、Vladislav Semak、Carmen Escolano、Joan Bosch、Mercedes Amat
DOI:10.1002/ejoc.201100409
日期:2011.7
cooperative multicatalytic cascade sequence involving isocyanoacetates and α,β-unsaturated ketones is described for the enantioselective synthesis of 2,3-dihydropyrroles. The key to promoting the multistep asymmetricreaction is the combination of cinchona alkaloid derived organocatalysts with silver nitrate. Merging both organic and metal catalyticcycles enables the formation of two C–C bonds and