PHOSPHONATE COMPOUNDS Russian patent published in 2015 - IPC C07F9/38 

FIELD: chemistry.

SUBSTANCE: present invention relates to novel compounds of formula T-B for use as dispersants and for inhibiting scaling and a method for production thereof, where B represents -X-N(W)(ZPO₃M₂), X is a C₂-C₅₀ hydrocarbon, optionally substituted with OH or COOH; Z is C₁-C₆ alkylene; M is H; W is ZPO₃M₂; T is selected from: (I)MOOC-X-N(U)-; (II) MOOC-C(X₂)₂-N(U)-; (iii) MOOC-X-S-; (IVi) [X(HO)_n(N-U)_n]_n-; (Vi) U-N(U)-[X-N(U)]_n-; (Vii) D-S-; (VIIIi) MOOC-X-O-; (IXi) MOOC-C(X²)₂-O; (Xi) NHR"- ; and (XIi) (DCO)₂-N-. U is selected from C₁-C₁₂ hydrocarbon chains, H and X-N(W)(ZPO₃M₂); X² is selected from H, C₁-C₂₀ hydrocarbon chains, optionally substituted C₁-C₁₂ hydrocarbon groups, which can be substituted with COOH; n', n" and n"' are equal to 1; D and R" are selected from C₁-C₅₀ hydrocarbon chains, optionally substituted with COOH; or the compound T-B is 3-phenoxypropylimino-bis-methylenephosphonic acid, wherein the compound T-B is not carboxypropyl-aminopropylimino-N-bis-(methylenephosphonic acid).

EFFECT: present method includes reacting a compound of formula Y-X-N(W)(ZPO₃M₂), where Y is selected from Cl, Br, I, HSO₄, NO₃, CH₃SO₃, p-toluene sulphonate, with a reaction counterpart T, which corresponds to said fragments at pH≥7 and 55-100°C.

11 cl, 20 ex