@article{pilli_böckelmann_alves_2001,  title={The stereochemistry of the addition of chlorotitanium enolates of N-acyl oxazolidin-2-ones to 5- and 6- membered N-acyliminium ions},  volume={12},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50532001000500007},  DOI={10.1590/S0103-50532001000500007},  number={5},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Pilli, Ronaldo A. and Böckelmann, Maria Alice and Alves, Conceição de Fatima},  year={2001},  month={Sep},  pages={634–651} }