Surface active calcium phosphates

C - Chemistry – Metallurgy – 01 – B

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C01B 25/26 (2006.01) A61K 33/42 (2006.01) A61P 1/02 (2006.01) C01B 25/32 (2006.01)

Patent

CA 2632009

A nitrogen complex of an inorganic phosphate comprising the anionic sub- structure (I); whereby a nitrogen atom (N) of a complexing agent is complexed to an oxygen atom (O) of the inorganic phosphate; wherein the nitrogen atom is selected from the group consisting of a nitrogen atom of an amine group or a nitrogen atom of a N-heteroaromatic ring; and wherein A and A' are each independently selected from the group of constituents consisting of a hydroxyl group (-OH), an oxide group (-O-) ,the group -OR where R is alkyl or substituted alkyl; an oxygen to which a nitrogen is complexed (-0.rarw.N) wherein the nitrogen atom is selected from the group consisting of a nitrogen atom of an amine group or a nitrogen atom of a N-heteroaromatic ring; and a phosphate of the form (i); wherein each of A" and A'" are selected independently from the same group of substituents as A and A"; wherein at least one of A, A', A" and A'" is an oxide (-O-) with the proviso that when A" and A'" are not present then at least one of A and A' is an oxide (-O-).

Complexe azoté d'un phosphate inorganique présentant la sous-structure anionique (I), dans laquelle un atome d'azote (N) d'un agent complexant est complexé à un atome d'oxygène (O) du phosphate inorganique; l'atome d'azote étant choisi dans le groupe comprenant un atome d'azote d'un groupe amine ou un atome d'azote d'un noyau N-hétéroaromatique; et A et A' étant choisis indépendamment dans le groupe de constituants comprenant un groupe hydroxyle (-OH), un groupe oxyde (-O-), le groupe -OR, où R est un alkyle ou un alkyle substitué; un oxygène auquel un azote est complexé (-0?N), l'atome d'azote étant choisi dans le groupe comprenant un atome d'azote d'un groupe amine ou un atome d'azote d'un noyau N-hétéroaromatique; et un phosphate de forme (I) ; dans lequel A'' et A''' sont choisis indépendamment dans le même groupe de substituants que A et A''; au moins A et/ou A' et/ou A'' et/ou A''' étant un oxyde (-O-), à condition que, lorsque A'' et A''' sont absents, A'' et A''' est un oxyde (-O-).

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