FIELD: chemistry.
SUBSTANCE: invention relates to a method of producing 2-(o-arylsulphonylaminophenyl)-4(3H)-quinazolinones of formula (I), where Ar is 4-tolyl, 2-naphthyl. Method is carried out by reacting 2-(o-arylsulphonylaminophenyl)-4H-3,1-benzoxazin-4-ones with ammonium disubstituted phosphate in dimethylacetamide in solvent boiling.
.
EFFECT: disclosed method enables to obtain desired products with high output (90–98 %) with simultaneous simplification of the method of production.
1 cl, 2 ex
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