Abstract
Abstract: A highly stereoselective methodology was developed to construct dihydrofurans. In the presence of a bifunctional squaramide catalyst, the Michael addition/cyclization between cyclohexane- 1,3-dione and α-bromonitroalkenes occurred smoothly to provide the desired dihydrofurans with high to excellent yields (90-94%) and good to high enantioselectivities (80-94% ee). This catalytic protocol was compatible with a range of structurally distinct α-bromonitroalkenes.
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