Exocyclic <i>N</i>-Acyliminium Ion (NAI) Cyclization: Access to Fully Substituted Oxazoles and Furocoumarins
作者:Venkata Nagarjuna Babu、Arumugavel Murugan、Narenderreddy Katta、Suman Devatha、Duddu S. Sharada
DOI:10.1021/acs.joc.9b00096
日期:2019.6.7
The key step in this transformation involves in situ generation of N-acyliminium ion (NAI) precursor under catalyst and solvent-free conditions and their further transformations promoted by superacid in the same pot. We have also presented the experimental evidence for the involvement of proto-solvated novel exocyclic N-acyliminium ion. Further, the UV–visible and fluorescence studies revealed that