@article{dadhania_patel_raval_2011,  title={A convenient and efficient protocol for the one pot synthesis of 3,4-Dihydropyrimidin-2-(1H)-ones catalyzed by ionic liquids under ultrasound irradiation},  volume={22},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50532011000300014},  DOI={10.1590/S0103-50532011000300014},  number={3},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Dadhania, Abhishek N and Patel, Vaibhav K and Raval, Dipak K},  year={2011},  month={Mar},  pages={511–516} }