The efficient Pd-catalyzed coupling of unstable bicyclic pyrimidines and pyrazoles under basic conditions was established for the first time. The reactions proceeded with excellent yields without hydrolysis using Pd2(dba)3,
t
BuXPhos, and K3PO4.
Key words
Pd-catalyzed coupling - bicyclic pyrimidine - bicyclic pyridine - pyrazole -
t
BuXPhos