Asymmetric C−N Bond Constructions via Crotylsilane Addition Reactions: A Stereocontrolled Route to Dipeptide Isosteres
作者:Craig E. Masse、Bradford S. Knight、Pericles Stavropoulos、James S. Panek
DOI:10.1021/ja964364w
日期:1997.7.1
A new approach to the asymmetric synthesis of (E)-olefin dipeptide isosteres is described based on asymmetric C−N bond constructions resulting from nitronium tetrafluoroborate (NO2BF4) promoted electrophilic nitrations of chiral (E)-crotylsilanes and from a copper(I)-catalyzed enantioselective aziridination of chiral (E)-crotylsilanes. The silane reagents undergo efficient anti-SE‘ additions to the
描述了一种不对称合成 (E)-烯烃二肽等排体的新方法,其基于由四氟硼酸硝 (NO2BF4) 促进的手性 (E)-巴豆基硅烷和铜 (I)-手性 (E)-巴豆基硅烷的催化对映选择性氮丙啶化反应。硅烷试剂对氮基亲电试剂进行有效的抗 SE' 加成,得到 >96% de 的 (E)-烯烃等排体。拓扑偏差主要由硅烷试剂的面偏差控制。通过几种相关的巴豆基硅烷衍生物探索了该方法的范围。(E)-烯烃等排体是生物活性肽中肽键的不可水解的刚性类似物。