Pyrylium salt



A pyrylium compound is a aromatic properties.

Chemical properties

The carbon to oxygen nucleophiles in the 2,4 and 6 positions and may result in ring-opening reactions.

Pyrones

A pyrylium cation with a hydroxyl anion maltol.

Chemical properties

2-Pyrones are known to react with carbon dioxide, for example:[2]

Chromenylium ion

  The benzo-fused pyrylium ion is also called benzopyrilium or according to IUPAC chromenylium ion. This is the charged version of 1-benzopyran or chromene (IUPAC).

Flavylium ion

In biology, the ion 2-phenylchromenylium is referred to as flavylium. A class of flavylium derived compounds are anthocyanins, i.e. pigments which are responsible for the colors of many flowers.

See also

  • 6-membered aromatic rings with one carbon replaced by another group: phosphorine
  • Pyrans are pyrones lacking the ketone group.

References

  1. ^ Heterocyclic Chemistry, T. L. Gilchrist, ISBN 0-582-27843-0
  2. ^ An alkynylboronic ester cycloaddition route to functionalised aromatic boronic esters Patrick M. Delaney, Jane E. Moore and Joseph P. A. Harrity Chem. Commun., 2006, 3323 - 3325, doi:10.1039/b607322k

External links

  • "2,6-Di-tert-butyl-4-methylpyrylium trifluoromethanesulfonate" Organic Syntheses, Coll. Vol. 7, p.144 (1990); Vol. 60, p.34 (1981).
 
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