作者:Shuming Chen、Robert G. Bergman、Jonathan A. Ellman
DOI:10.1021/acs.orglett.5b00979
日期:2015.6.5
A Rh(III)-catalyzed C–H functionalization approach was developed for the preparation of multisubstituted 3-fluoropyridines from α-fluoro-α,β-unsaturated oximes and alkynes. Oximes substituted with aryl, heteroaryl, and alkyl β-substituents were effective coupling partners, as were symmetrical and unsymmetrical alkynes with aryl and alkyl substituents. The first examples of coupling α,β-unsaturated
开发了一种Rh(III)催化的C–H官能化方法,用于从α-氟-α,β-不饱和肟和炔烃制备多取代的3-氟吡啶。被芳基,杂芳基和烷基β-取代基取代的肟是有效的偶合伙伴,具有芳基和烷基取代基的对称和不对称炔烃也是有效的偶合伙伴。还证明了将α,β-不饱和肟与末端炔烃偶联的第一个例子,并以一致的高区域选择性进行,以提供单一的3-氟吡啶区域异构体。反应还可以方便地在实验室的空气中进行。