@article{padwa_sá_1999,  title={Rhodium(II)-Catalysed Intramolecular O-H Insertion of alpha-Diazo-gamma-Azido-delta-Hydroxy-beta-Ketoesters: Evidence for a Novel Sigmatropic Rearrangement of an Allylic Azide Intermediate},  volume={10},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50531999000300012},  DOI={10.1590/S0103-50531999000300012},  number={3},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Padwa, Albert and Sá, Marcus Mandolesi},  year={1999},  pages={231–236} }