Benzoxazines are a group of
bicyclic
heterocyclic chemical compounds that consist of a
benzene ring fused to an
oxazine ring.
The different isomers depend on the relative positions of the oxygen and nitrogen atoms in the oxazine ring, on the location of ring fusion, and on the position of the
double bond in the oxazine ring.
[ They have the molecular formula C8H7NO.
]
Preparation
1,3-Benzoxazines can be synthesized by the Mannich reaction using a phenol, an amine, and formaldehyde.
Uses
Pharmaceutical drugs
Benzoxazine rings form the central chemical structure of a number of pharmaceutical drugs including, for example, apararenone,
Polymers
, also called benzoxazine resins, are a class of polymers that are produced from the ring-opening polymerization of 3-phenyl-2,4-dihydro-1,3-benzoxazine monomers and its chemical derivatives.
