Abstract
The room‐temperature ionic liquid n‐butylpyridinium tetrafluoroborate (BPyBF4) is used as a recyclable alternative to classical molecular solvents in the one‐pot synthesis of 2‐arylimidazo[1,2‐a]pyrimidines by reaction with ketones, [hydroxy(tosyloxy)iodo]benzene, and 2‐aminopyrimidine. Significant rate enhancements and improved yields have been observed.