of various chiral carbon centers, its synthetic potential toward an enantioenriched atropisomer has not been explored yet. Reported herein is a phosphine-catalyzed atroposelective (4+2) annulation of δ-acetoxy allenoates and 2-hydroxyquinone derivatives. The reaction provides expedient access to aryl-naphthaquinone atropisomers by the de novo construction of a benzene ring. The two functionalities of
尽管不对称膦催化是构建各种手性碳中心的有力工具,但尚未探索其对映体富对映异构体的合成潜力。本文报道了δ-乙酰氧基烯丙基酯和2-
羟基醌衍
生物的膦催化的对映选择性(4 + 2)环化。通过苯环的从头构建,该反应提供了便利的芳基-
萘醌阻转异构体的途径。催化剂的两种官能度,叔膦(刘易斯碱)和叔胺(布朗斯台德碱)共同使该方法具有很高的区域选择性和对映选择性。