Oxazines

Oxazines (after the Hantzsch - Widman system) can be heterocyclic, unsaturated carbon compounds, possess both an oxygen and a nitrogen atom of the six-membered ring in the same system. According to the position of the heteroatoms of the corresponding substance, 1,2- oxazine, 1,3- oxazine, or 1,4- oxazine is referred to. One of the simplest is the hydrogenated oxazines morpholine ( tetrahydro-1 ,4 -oxazine or 1,4- oxazinan ).

Occurrence

Oxazines are in nature very often used as dyes, such as an indicator dye litmus, and glycosides. Very complex representatives are toxic Oxazinine.

Properties

The presence of the two hetero- atoms are oxygen and nitrogen, to give the oxazines ampholytes, i.e. they have both acidic and basic properties. Furthermore, the polar substances are usually soluble in water. Aromatic oxazines very often exhibit fluorescence.

Use

Oxazines are used in the chemical and pharmaceutical industry as an important Ausgangs-/Zwischensubstanzen for drugs (eg antibiotics ) as well as dyes (like for CDs / DVDs).