Asymmetric Syntheses of the Flavonoid Diels–Alder Natural Products Sanggenons C and O
作者:Chao Qi、Yuan Xiong、Vincent Eschenbrenner-Lux、Huan Cong、John A. Porco
DOI:10.1021/jacs.5b12778
日期:2016.1.27
has been utilized to enable a concisesynthesis of the hydrobenzofuro[3,2-b]chromenone core structure of the natural products sanggenon A and sanggenol F. In addition, catalytic, enantioselective [4+2] cycloadditions of 2'-hydroxychalcones have been accomplished using B(OPh)3/BINOL complexes. Asymmetric syntheses of the flavonoid Diels-Alder natural products sanggenons C and O have been achieved employing
金属催化的双烯丙氧基黄酮双克莱森重排已被用于合成天然产物桑格农 A 和桑格酚 F 的氢苯并呋喃 [3,2-b] 色烯酮核心结构。此外,催化、对映选择性 [ 2'-羟基查尔酮的 4+2] 环加成已使用 B(OPh)3/BINOL 复合物完成。黄酮类 Diels-Alder 天然产物 Sanggenons C 和 O 的不对称合成已通过涉及 [4+2] 环加成的外消旋混合物(立体发散 RRM)的立体发散反应实现。