oxazine
Oxazine is a heterocyclic compound defined by a six-membered ring that contains one oxygen atom and one nitrogen atom. The parent ring can be encountered in several isomeric arrangements, with common forms including 1,2-oxazine, 1,3-oxazine and 1,4-oxazine, named by the relative positions of the heteroatoms. Substituted oxazines are widespread, and the ring framework also appears in fused systems such as benzoxazines, where the oxazine ring is joined to a benzene ring.
Oxazines occur in a variety of chemical contexts. Some oxazines are studied as heterocyclic scaffolds in medicinal
Synthesis and reactions of oxazines typically involve cyclization steps that assemble the six-membered O–N heterocycle from
Safety and handling follow general guidelines for heterocycles: avoid inhalation and contact with skin or eyes,