Chemistry of Heterocyclic Compounds p. 1201 - 1206 (1998)
Update date:2022-08-11
Topics:
Sazonov
Mamaeva
Safonova
Reaction of 5-hydroxy-6-aminopyrimidines with 2-bromohydroresorcinol and bromodimedone in DMF in the presence of sodium hydride gave 6,7,8,9-tetrahydro-10H-pyrimido[5,4-b][1,4]benzoxazines. When 4-chloro-5-hydroxy-6-aminopyrimidine was treated with bromodimedone the principal products were 6,7,8,9-tetrahydropyrimido[4,5-b][1,4]benzodioxanes. The nucleophilic substitution of the chlorine atom in position 4 of the tetrahydropyrimidobenzoxazines by amines, sodium alkanoates, and thiourea has been studied and the corresponding amines and alkoxy- and thio derivatives of this tricyclic system obtained. 1999 Kluwer Academic/Plenum Publishers.
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