Asymmetric synthesis of trifluoromethyl-substituted 3,3′-pyrrolidinyl-dispirooxindoles through organocatalytic 1,3-dipolar cycloaddition reactions

A series of trifluoromethylated 3,3′-pyrrolidinyl-dispirooxindoles were constructedviaasymmetric [3 + 2] cycloaddition.