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Borinic compositions

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Title: Borinic compositions.
Abstract: A stabilized topical composition comprising a borinic acid derivative, e.g., a borinic ester. ...

Browse recent Colgate-palmolive Company patents - Piscataway, NJ, US
Inventors: Venda Porter, Andre Morgan, Stanislav Jaracz, Jennifer Gronlund, Guofeng Xu, Donghui Wu, Michael Prencipe, Ravi Subramanyam
USPTO Applicaton #: #20120052025 - Class: 424 52 (USPTO) - 03/01/12 - Class 424 
Drug, Bio-affecting And Body Treating Compositions > Dentifrices (includes Mouth Wash) >Fluorine Or Fluorine Compound Containing

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The Patent Description & Claims data below is from USPTO Patent Application 20120052025, Borinic compositions.

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This application claims the benefit of U.S. Provisional Application 61/183,788, filed Jun. 3, 2009 and U.S. Provisional Application 61/183,792, also filed Jun. 3, 2009, the contents of which are incorporated herein by reference.


The present invention relates to antimicrobial compositions containing a borinic acid derivative, e.g. a borinic ester. In particular embodiments, the invention covers topical antimicrobial compositions, for example topical compositions for treating fungal or bacterial infections of the skin or nails, and oral compositions, for example dentifrice, for reducing bacteria in the mouth, e.g. for inhibiting and reducing plaque, gingivitis and dental caries.

Although some borinic esters are effective as antibacterial agents, incorporating borinic esters into oral care compositions presents difficulties, as borinic esters have proven to be unstable when added to aqueous compositions. For example, borinic esters may hydrolyze and decompose, e.g., in oral care compositions. Additionally, borinic esters may be insoluble in aqueous compositions. For example, the solubility of 3-hydroxypyridine-2-carbonyloxy-bis(3-chloro-4-methylphenyl)-borane in water is only 100 ppm, and its solubility in various oils may be less than 0.5%. There remains a need to develop compositions and methods to incorporate borinic acid derivatives stably in oral care compositions.



The present invention is directed to the surprising discovery that certain borinic esters are stable, soluble, and retain antimicrobial activity when incorporated into an topical or oral care composition, e.g., a topical pharmaceutical composition or a dentifrice or mouthwash.

In one embodiment, the borinic acid derivatives of the present invention are borinic esters, e.g. of formula A:

wherein R1 and R2 are the same or different (e.g. the same), and are selected from arylalkyl, aryl, cycloalkyl, or heterocycle (e.g. substituted or unsubstituted aryl or heteroaryl, for example phenyl, chlorophenyl, methylphenyl, or methylchlorophenyl); and R3 is heteroaryl, heteroarylalkyl, heteroarylcarbonyl, or heteroarylalkylcarbonyl (e.g., substituted or unsubstituted heteroaryl, for example quinolinyl or hydroxypyridinylcarbonyl), in free or pharmaceutically acceptable salt form, in combination with a pharmaceutically acceptable carrier. For example, in one embodiment R1 and R2 are the same and are both aryl, e.g., phenyl, chlorophenyl, methylphenyl, or methylchlorophenyl.

Heteroaryl is for example an aryl group containing 1, 2 or 3 nitrogen atoms, for example pyridinyl, quinolinyl, hydroxypyridinyl, or hydroxyquinolinol. Alkyl is for example C1-4 alkyl. Substitutions are for example halogen, e.g., chloro or fluoro, hydroxy, or C1-4 alkyl.

The borinic esters useful in the present invention thus include, for example, (i) boron picolinates, e.g. diaryl boron picolinates, for example 3-hydroxypyridine-2-carbonyloxy-bis(3-chloro-4-methylphenyl)-borane or 3-hydroxypyridine-2-carbonyloxy-bis(2-methyl-4-chlorophenyl)-borane, as well as (ii) diaryl borinic esters, for example diphenylborane-8-hydroxyquinolinate (PBHQ).

In one embodiment, the borinic esters are compounds as described in WO 2006/102604, incorporated herein by reference, e.g., of Formula (I)

wherein R* and R** are independently substituted or unsubstituted aralkyl, substituted or unsubstituted aryl, substituted or unsubstituted cycloalkyl, or substituted or unsubstituted heterocycle; z is 0 or 1, with the proviso, that if z is 1, then A is CR10 or N, and D is N or CR12, and with the further proviso that if z is 0 then D is O, S or NR12a; E is hydrogen, hydroxy, alkoxy, (cycloalkyl)oxy, (cycloheteroalkyl)oxy, carboxy, or alkyloxycarbonyl; m is 0 or 1; R12 is hydrogen, hydroxyalkyl, aminoalkyl, alkylaminoalkyl, dialkylaminoalkyl, carboxy, alkyloxycarbonyl, amido, hydroxy, alkoxy, aryloxy, thio, alkylthio, arylthio, alkylsulfonyl, dialkylaminosulfonyl, alkylaminosulfonyl, aminosulfonyl, sulfo, cyano, halo, nitro, amino, dialkylamino, alkylamino, arylamino, diarylamino, aralkylamino, or diaralkylamino; R12a is hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted heteroalkyl, substituted or unsubstituted aralkyl, substituted or unsubstituted aryl, substituted or unsubstituted cycloalkyl, or substituted or unsubstituted heterocycle; and

R9 and R10 are independently hydrogen, alkyl, cycloalkyl, hydroxyalkyl, aminoalkyl, alkylaminoalkyl, dialkylaminoalkyl, halo, carbonyl, hydroxyimino, carboxy, alkyloxycarbonyl, alkylthio, alkylsulfonyl, arylthio, dialkylaminosulfonyl, alkylaminosulfonyl, aminosulfonyl, amino, alkoxy, nitro, sulfo, or hydroxy;

in free or pharmaceutically acceptable salt form.

“Aralkyl” and “alkaryl” are sometimes used to refer to arylalkyl and alkylaryl respectively. The alkyl or aryl portion of any moiety recited for R9, R19, or R12 is optionally substituted, for example with hydroxy, halogen, or C1-4 alkyl.

Alkyl is preferably C1-4 alkyl. Cycloalkyl is preferably C3-7 cycloalkyl. Aryl is preferably phenyl.

In some embodiments, E is a member selected from hydrogen, hydroxy, or (cycloheteroalkyl)oxy such as 2-morpholinoethoxy.

In other embodiments, R12 is (CH2)kOH (where k=1, 2 or 3), CH2NH2, CH2NH-alkyl, CH2N(alkyl)2, CO2H, CO2alkyl, CONH2, OH, alkoxy, aryloxy, SH, S-alkyl, S-aryl, SO2alkyl, SO2N(alkyl)2, SO2NHalkyl, SO2NH2, SO3H, SCF3, CN, halogen, CF3, NO2, NH2, 2°-amino, 3°-amino, NH2SO2 or CONH2.

In still other embodiments, R9 and R19 are independently hydrogen, alkyl, cycloalkyl, (CH2)nOH (n=1 to 3), CH2NH2, CH2NHalkyl, CH2N(alkyl)2, halogen, CHO, CH═NOH, CO2H, CO2-alkyl, S-alkyl, S02-alkyl, S-aryl, SO2N(alkyl)2, SO2NHalkyl, SO2NH2, NH2, alkoxy, CF3, SCF3, NO2, SO3H or OH;

Compounds of Formula 1 may exist in rotameric form, and the illustrated dative bond (arrow) may or may not be present, i.e., the present invention includes those compounds in which coordination between the boron atom and the nitrogen or hydroxy of the picolinate is present and those compounds where such coordination is missing. The present invention also includes those compounds of Formula 1 in which a dative bond is formed between the boron and another atom of the molecule. In addition, those of skill in the art, e.g., organic and medicinal chemistry, will appreciate that the large difference in atomic radius between carbon and boron can allow for the formation of solvent coordination complexes in which a solvent molecule, such as water, can be inserted between the boron atom and the nitrogen atom of the picolinate ring. The present invention includes such adducts of the compounds of Formula 1.

In one embodiment of the invention in which z is 1, the compound of Formula 1 has a structure according to the following formula:

wherein D is selected from N and CR12.

In another embodiment of the invention, in which z is 0, the compound of Formula 1 has a structure according to the following formula:

wherein D is a member selected from O, S and NR12a.

In one embodiment of the invention, R* and R** are the same. In a more specific embodiment, R* and R* * are substituted or unsubstituted aryl. In a still more specific embodiment, R* and R** are substituted or unsubstituted phenyl, wherein said substituted or unsubstituted phenyl has the structure:

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stats Patent Info
Application #
US 20120052025 A1
Publish Date
Document #
File Date
424 52
Other USPTO Classes
514 64, 424 54
International Class

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