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The tautomerism of the 2-aryl-substituted tetrahydro-1,3-oxazines with the general structures 390, 391, 393, 394, and 396-406 has been studied in detail. Only the structures of the ring forms are shown. In all series, the ring-chain tautomeric equilibria measured in CDCl.i at room temperature can be described by the equation... [Pg.447]

See other pages where 2- Aryl-substituted tetrahydro-1,3-oxazines is mentioned: [Pg.602] [Pg.450] [Pg.309] [Pg.416] [Pg.366] [Pg.29] [Pg.249]