Asymmetric synthesis of trifluoromethyl-substituted 3,3′-pyrrolidinyl-dispirooxindoles through organocatalytic 1,3-dipolar cycloaddition reactions
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DOI: 10.1039/c6qo00723f
Abstract: Unprecedented asymmetric exo′-selective [3 + 2] cycloaddition reactions of CF3-containing isatin-derived azomethine ylides with methyleneindolinones have been disclosed. Under bifunctional organocatalysis by cinchona-derived squaramide catalysts, a series of potential biologically important trifluoromethylated 3,3′-pyrrolidinyl-dispirooxindoles were efficiently… read more here.
Keywords: pyrrolidinyl dispirooxindoles; cycloaddition reactions; synthesis trifluoromethyl; asymmetric synthesis ... See more keywords