RU96100932A - DERIVATIVES OF 8,9-DIHYDROXANTHENE AND METHOD FOR PRODUCING THEM - Google Patents

Claims (2)

1. Derivatives of 8,9-dihydroxanthene of General formula I

where R ₁ is H, alkyl, halogen;
R ₂ is R ₃ is H, alkyl;
R ₄ - R ₇ - H, alkyl, alkoxy, allyl, nitro, amino, alkylamino, dialkylamino, halogen, hydroxy;
A - O, NR ₈ , N ⁺ HR ₈ X ^- , N ⁺ R ₈ R ₉ X ^- ,

N ⁺ (CH _{2) 5} X ^- (with R ₈ - R ₉ - H, alkyl, aryl, ^{hetaryl; X - - Cl, Br,} NO _3, HSO _4, ClO _4). 2. A method of obtaining derivatives of 8,9-dihydroxantene of General formula I

where R ₁ is H, alkyl, halogen;
R ₂ is R ₃ is H, alkyl;
R ₄ - R ₇ - H, alkyl, alkoxy, allyl, nitro, amino, alkylamino, dialkylamino, halogen, hydroxy;
A = O, NR ₈ , N ⁺ HR ₈ X ^- , N ⁺ R ₈ R ⁹ X ^- ,

N ⁺ (CH ₂ ) ₅ X ^- (at R ₈ - R ₉ - H, alkyl, aryl, hetaryl; X ^- = Cl, Br, NO ₃ , HSO ₄ , ClO ₄ ),
characterized in that the salts of 5.5-R ₂ R ₃ -1,3-dialkoxy-1-R ₄ -cyclohexene of the general formula II

enter into interaction with 2-hydroxyaraldehydes of the General formula III

where R ₄ - R ₇ have the above meanings;
X ^- - ClO $\genfrac{}{}{0ex}{}{\text{-}}{\text{4}}$ Hlg ^- ,
followed by action on the resulting salts of 7-alkoxy-8,9-dihydroxanthylium of General formula IV

where R ₁ - R ₇ have the above meanings;
X ^- - ClO ₄ , Hlg,
either by amines to obtain compounds of general formula I, where A is N ⁺ HR ₈ ClO ₄ ^- (Hlg), N ⁺ R ₈ R ₉ ClO ₄ ^- (Hlg), or water to obtain compounds of general formula (I), where A - O, and if necessary, to obtain compounds of the general formula (I), where A is NR ₈ , followed by action on the compounds of the general formula I, where A is N ⁺ HR ₈ ClO ₄ ^- (Hlg) with bases, and if necessary, for preparing salts of 7-imino-8,9-digidroksantena general formula I, wherein a - N ⁺ HR ₈ X ^-, with X ^- as defined above various host, followed by subjecting the solution of the compounds of general formula I, where a - NR ₈ ki lots, in all cases R ₁ - R ₉ are as hereinbefore defined.