Stereoselective Synthesis of Fused Vinylcyclopropanes by Intramolecular Tsuji–Trost Cascade Cyclization
作者:John Braun、Maxim I. Ariëns、Bianca T. Matsuo、Steven de Vries、Ellen D. H. van Wordragen、Brecht D. Ellenbroek、Christophe M. L. Vande Velde、Romano V. A. Orru、Eelco Ruijter
DOI:10.1021/acs.orglett.8b02232
日期:2018.11.2
pendant β-ketoamide or related carbon nucleophile to give γ-lactam-fused vinylcyclopropanes is reported. In addition to two new rings, the products contain three new C-C stereocenters (two of which are quaternary) with a 9:1 dr. Moreover, the reaction proceeds in >94% enantiospecificity with optically enriched starting materials, using an inexpensive carbohydrate as the source of chirality.
据报道,立体异构的分子内Tsuji-Trost级联环合(均)烯丙基邻二乙酸酯与β-酮基侧基或相关的碳亲核试剂,生成γ-内酰胺基融合的乙烯基环丙烷。除了两个新的环外,产品还包含三个新的CC立体中心(其中两个是四元的),博士比为9:1。此外,使用廉价的碳水化合物作为手性来源,该反应在光学富集的起始原料中> 94%对映体特异性进行。