Diastereo- and enantioselective oxa-hetero-Diels-Alder reactions of enones with aryl trifluoromethyl ketones that afford tetrahydropyranone derivatives catalyzed by an amine-based catalyst system are reported. The major diastereomers of the tetrahydropyranone products obtained in these reactions had the relative stereochemistry different from that of the previously synthesized tetrahydropyranone derivatives.

中文翻译：

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烯酮与芳基三氟甲基酮的催化对映选择性氧杂杂狄尔斯-阿尔德反应：四氢吡喃酮的合成

报道了烯类与芳基三氟甲基酮的非对映和对映选择性的氧杂-杂-Diels-Alder反应，该反应提供了基于胺的催化剂体系催化的四氢吡喃酮衍生物。在这些反应中获得的四氢吡喃酮产物的主要非对映异构体的相对立体化学不同于先前合成的四氢吡喃酮衍生物。