Palladium-Catalyzed Cross-Coupling Reaction of Trialkylbismuthines with 2-Haloazines and Diazines
摘要:
An efficient method for the cross-coupling reaction of primary trialkybismuth reagents with 2-haloazines and diazines is reported. The reaction functions with pyridines, pyrimidines, pyridazines and pyrazines and tolerates many functional groups. This method gives access to 2-alkylazines and diazines, a class of compounds which is important in medicinal chemistry.
Superacid-Promoted Additions Involving Vinyl-Substituted Pyrimidines, Quinoxalines, and Quinazolines: Mechanisms Correlated to Charge Distributions
作者:Yiliang Zhang、Matthew R. Sheets、Erum K. Raja、Kenneth N. Boblak、Douglas A. Klumpp
DOI:10.1021/ja202557z
日期:2011.6.8
quinoxalines, and quinazolines exhibit an unusual regioelectronic effect that controls the type of addition reaction observed. Depending on the ring position of the vinyl substituent, either conjugate addition or Markovnikov addition occurs. The mode of addition has been shown to correlate well to NBO calculated charges.