@article{zhu_chen_liu_ding_wu_2009,  title={Catalyst: and solvent-free synthesis of imidazo[1,2-a]pyridines},  volume={20},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50532009000300012},  DOI={10.1590/S0103-50532009000300012},  number={3},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Zhu, Dong-Jian and Chen, Jiu-Xi and Liu, Miao-Chang and Ding, Jin-Chang and Wu, Hua-Yue},  year={2009},  pages={482–487} }