Electrophilic Iron Catalyst Paired with a Lithium Cation Enables Selective Functionalization of Non‐Activated Aliphatic C−H Bonds via Metallocarbene Intermediates
作者:Alberto Hernán‐Gómez、Mònica Rodríguez、Teodor Parella、Miquel Costas
DOI:10.1002/anie.201905986
日期:2019.9.23
Combining an electrophilic iron complex [Fe(F pda)(THF)]2 (3) [F pda=N,N'-bis(pentafluorophenyl)-o-phenylenediamide] with the pre-activation of α-alkyl-substituted α-diazoesters reagents by LiAl(ORF )4 [ORF =(OC(CF3 )3 ] provides unprecedented access to selective iron-catalyzed intramolecular functionalization of strong alkyl C(sp3 )-H bonds. Reactions occur at 25 °C via α-alkyl-metallocarbene intermediates
将亲电子配合物[Fe(F pda)(THF)] 2(3)[F pda = N,N'-双(五氟苯基)-邻苯二甲酰胺]与α-烷基取代的α-的预活化结合LiAl(ORF)4 [ORF =(OC(CF3)3]金属碳烯中间体,其活性/选择性与羧酸铑催化剂相似,机理研究表明,锂阳离子在决定亲电性铁碳卡宾中间体的形成速率中起着至关重要的作用,然后通过协同插入CH中进行键。