Efficient methodologies for constructing several multiring frameworks have been developed utilizing the cascade reactions of air-stable isochromenylium tetrafluoroborates with olefins. Successive additions of two equivalents of styrene-type olefins to isochromenylium tetrafluoroborate (ICTB) 1 have been observed and their mechanisms were proposed and discussed. Intramolecular capture of the early stage cationic intermediates by predevised heteroatoms or Friedel-Crafts donors provided two different types of bridged-ring systems.
No takes yet. Share an insight, caveat, or question.
Hu et al. (2009) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: