@article{pereira_alves_böckelmann_pilli_2008,  title={Stereoselective syntheses of (+)- isoretronecanol and (+)-5-epi-tashiromine via addition of chiral titanium (iv) enolates to cyclic n-acyliminium ions},  volume={31},  ISSN={0100-4042},  url={https://doi.org/10.1590/S0100-40422008000400012},  DOI={10.1590/S0100-40422008000400012},  number={4},  journal={Química Nova},  publisher={Sociedade Brasileira de Química},  author={Pereira, Elaine and Alves, Conceição de Fátima and Böckelmann, Maria Alice and Pilli, Ronaldo A.},  year={2008},  pages={771–775} }