Highly enantioselective Michael/cyclization tandem reaction between Dimedone (cas 126-81-8) and isatylidene malononitriles
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Add time:09/25/2019 Source:sciencedirect.com
A highly enantioselective Michael/cyclization tandem reaction between Dimedone (cas 126-81-8) and isatylidene malononitriles has been developed. With 5 mol% of bifunctional organocatalyst C15, chiral spiro[2-amino-4H-pyran-oxindole] derivatives were obtained in excellent yields (97–99%) with excellent enantioselectivities (up to > 99% ee).
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