Cobalt‐Catalyzed α‐Arylation of Substituted α‐Bromo α‐Fluoro β‐Lactams with Diaryl Zinc Reagents: Generalization to Functionalized Bromo Derivatives
作者:Mélanie M. Lorion、Vanessa Koch、Martin Nieger、Hi‐Yung Chen、Aiwen Lei、Stefan Bräse、Janine Cossy
DOI:10.1002/chem.202001721
日期:2020.10.15
A cobalt‐catalyzed cross‐coupling of α‐bromo α‐fluoro β‐lactams with diarylzinc or diallylzinc reagents is herein disclosed. The protocol proved to be general, chemoselective and operationally simple allowing the C4 functionalization of β‐lactams. The substrate scope was expanded to α‐bromo lactams and amides, α‐bromo lactones and esters as well as N‐ and O‐containing heterocycles.
本文公开了α-溴α-氟β-内酰胺与二芳基锌或二烯丙基锌试剂的钴催化交叉偶联。该协议被证明是通用的,化学选择性的并且操作简单,可以使β-内酰胺的C4功能化。底物的范围扩大到α-溴内酰胺和酰胺,α-溴内酯和酯以及含N和O的杂环。