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[摘要]:The enantioselective hetero-Diels-Alder reaction of Danishefsky's diene with simple aromatic and aliphatic aldehydes is catalyzed by chiral tridentate Schiff base-chromium(III) complexes. In many cases, 2,3-dihydropyran-4-ones are obtained in good yields (up to 99%) and high enantioselectivities (up to 97%). |
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