A novel method of nuclear isopentenylation which gives exclusively 2,2-dimethylchromans has been achieved by the direct condensation of phenols, viz. resorcinol, quinol, pyrogallol, and phloroglucinol, with 2-methylbuta-1,3-diene(isoprene) in the presence of orthophosphoric acid as catalyst. Condensation of 2-methylbut-3-en-2-ol with phenols in the presence of aqueous citric acid has been reinvestigated.
No takes yet. Share an insight, caveat, or question.
Ahluwalia et al. (1982) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: