@article{costa_pisoni_silva_petzhold_russowsky_ceschi_2009,  title={Lewis acid promoted Friedländer condensation reactions between anthranilonitrile and ketones for the synthesis of tacrine and its analogues},  volume={20},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50532009000800009},  DOI={10.1590/S0103-50532009000800009},  number={8},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Costa, Jessie S. da and Pisoni, Diego S. and Silva, Claudia B. da and Petzhold, Cesar L. and Russowsky, Dennis and Ceschi, Marco A.},  year={2009},  pages={1448–1454} }