摘要:
Asymmetric N-H insertion of phenyldiazoacetates with anilines catalyzed cooperatively by achiral dirhodium(II) carboxylates and cinchona alkaloids is described. A new catalytic system of dirhodium(II) tetrakis(triphenylacetate), Rh(2)(TPA)(4), and dihydrocinchonine provides phenylglycine derivatives in up to 71% ee.