Abstract
Chiral C2-symmetric 3,3'-bis((R,R)-2-naphthylethylaminomethyl)-(R)-binaphthol (AMB4) functions as an efficient organocatalyst for the asymmetric epoxidation of various alkylidenemalononitriles. The spiro-epoxyoxindole products obtained from isatilidenemalononitriles were easily transformed to the corresponding chiral dihydroquinoxalinyl spirooxindoles.
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