Regioselective Suzuki-Miyaura Cross-Coupling Reactions of 2,6-Dichloroquinoxaline
摘要:
A variety of mono- and diarylated quinoxaline derivatives were prepared by site-selective Suzuki-Miyaura cross-coupling reactions of 2,6-dichloroquinoxaline. The selectivity is controlled by electronic parameters.
Regioselective Suzuki-Miyaura Cross-Coupling Reactions of 2,6-Dichloroquinoxaline
摘要:
A variety of mono- and diarylated quinoxaline derivatives were prepared by site-selective Suzuki-Miyaura cross-coupling reactions of 2,6-dichloroquinoxaline. The selectivity is controlled by electronic parameters.
An efficient Rh-catalyzedoxidativeC–Hactivation/annulation of 2-arylquinoxalines with internal alkynes is described using Cu(OAc)2·H2O and AgBF4 to afford a diverse variety of substituted quarternary ammonium salts at room temperature. The mechanism of the protocol is established on the basis of isolation of the 5-membered rhodacycle intermediate and kinetic isotope studies. The mild reaction conditions