Ultrasound assisted one-pot, three-components synthesis of pyrimido[1,2-a]benzimidazoles and pyrazolo[3,4-b]pyridines: A new access via phenylsulfone synthon

Saleh, T. S., Eldebss, T. M. A., & Albishri, H. M. (2012). Ultrasound assisted one-pot, three-components synthesis of pyrimido[1,2-a]benzimidazoles and pyrazolo[3,4-b]pyridines: A new access via phenylsulfone synthon. Ultrasonics Sonochemistry, 19(1), 49–55. https://doi.org/10.1016/j.ultsonch.2011.05.003