Dibenzo[c,h][1,5]naphthyridines and their use as DNA probes

1. A compound of formula (I)

wherein:

R1, R3, R4, R7, R9 and R10 are identical or different and independently chosen from H; Alkyl optionally substituted by one or more —NRR′, —OH, OAlkyl, CF 3 ; a halogen atom;

R2=H; OAlkyl; O(C2-C10)Alkyl wherein (C2-C10)Alkyl is substituted by one or more —NRR′, —OH, OAlkyl, CF 3 ; a halogen atom;

R1′=H; Alkyl or (C2-C10)Alkyl wherein (C2-C10)Alkyl is substituted by one or more —NRR′, —OH, OAlkyl, CF 3 ; a halogen atom;

n=0 or 1;

X=linear Alkyl;

m=0 or 1;

Y=linear Alkyl;

R2′ and R3′, identical or different, are independently chosen from H; Alkyl or (C2-C10)Alkyl wherein (C2-C10)Alkyl is substituted by one or more —OH, —NRR′, —OAlkyl, CF 3 ;

R8=H; OAlkyl; O(C2-C10)Alkyl wherein (C2-C10)Alkyl is substituted by one or more —NRR′, —OH, OAlkyl, CF 3 ; a halogen atom;

R12=H; Alkyl optionally substituted by one or more —NRR′, —OH, OAlkyl, CF 3 ,

 wherein X, R1′, R2′, R3′, Y, m, n are defined as above;

R, R′, identical or different, represent independently H, Alkyl or (C2-C10)Alkyl wherein (C2-C10)Alkyl is substituted by one or more —NRR′, —OH, OAlkyl, CF 3 ; or their acceptable salts, hydrates, or hydrated salts, or the polymorphic crystalline structures of these compounds or their optical isomers, racemates, diastereomers or enantiomers,

with the exception of compounds wherein:

R1=R3=R4=R7=R9=R10=H, m=0, n=1, R1′=H, R2′=R3′=Methyl, R2, R8 represent independently H or OMethyl, R12=H or Methyl and Y═—(CH 2 ) 2 — or —(CH 2 ) 3 —.

2. A compound according to claim 1 , wherein

R1=R4=R7=R9=R10=H;

R2=H or —OAlkyl;

R1′=H;

n=0 or 1;

X=linear Alkyl;

m=0 or 1;

Y=linear Alkyl;

R2′ and R3′ identical or different, are independently chosen from H; Alkyl or (C2-C10)Alkyl substituted by one or more OH, and are not simultaneously H;

R8=H, OAlkyl;

R12=H, Alkyl or

 wherein X, R1′, R2′, R3′, Y, m, n are defined as in claim 1

R, R′, identical or different, represent independently H, Alkyl or (C2-C10)Alkyl substituted by one or more —NRR′, —OH, OAlkyl, CF 3 ,

or their acceptable salts, hydrates, or hydrated salts, or the polymorphic crystalline structures of these compounds or their optical isomers, racemates, diastereomers or enantiomers,

with the exception of compounds wherein:

R1=R3=R4=R7=R9=R10=H, m=0, n=1, R1′=H, R2′=R3′=Methyl, R2, R8 represent independently H or OMethyl, R12=H or Methyl and Y═—(CH 2 ) 2 — or —(CH 2 ) 3 —.

3. A compound according to claim 1 selected from:

N′-Dibenzo[c,h][1,5]naphthyridin-6-ylmethyl-N,N-diethyl-propane-1,3-diamine,

2-[2-(Dibenzo[c,h][1,5]naphthyridin-6-ylamino)-ethylamino]-ethanol,

dibenzo[c,h][1,5]naphthyridin-6-yl-methyl-N,N-dimethyl-ethane-1,2-diamine,

N′-dibenzo[c,h][1,5]naphthyridin-6-yl-methyl-N,N-dimethyl-propane-1,3-diamine,

N′-dibenzo[c,h][1,5]naphthyridin-6-yl-methylamino-2-methyl-propane-1,3-diol,

N′-(2-methoxy-12-methyl-dibenzo[c,h][1,5]naphthyridin-6-yl)-N,N-dimethyl-propane-1,3-diamine,

N6,N12-bis-(2-dimethylamino-ethyl)-2-methoxy-dibenzo[c,h][1,5]naphthyridin-6,12-diamine,

N6,N12-bis-(3-dimethylamino-propyl)-2-methoxy-dibenzo[c,h][1,5]naphthyridine-6,12-diamine,

N,N′-bis-(3-dimethylaminopropyl)-2,8-dimethoxy-dibenzo[c,h][1,5]naphthyridin-6,12-diamine,

N,N′-bis-(3-dimethylamino-ethyl)-2,8-dimethoxy-dibenzo[c,h][1,5]naphthyridin-6,12-diamine,

or their acceptable salts, hydrates, or hydrated salts, or the polymorphic crystalline structures of these compounds or their optical isomers, racemates, diastereomers or enantiomers.

4. A method of using a compound of formula (I) as a DNA probe, comprising:

contacting DNA with the compound of formula (I):

wherein:

R1, R3, R4, R7, R9 and R10 are identical or different and independently chosen from H;

Alkyl optionally substituted by one or more —NRR′, —OH, OAlkyl, CF 3 ; a halogen atom;

R2=H; OAlkyl; O(C2-C10)Alkyl wherein (C2-C10)Alkyl is substituted by one or more —NRR′, —OH, OAlkyl, CF 3 ; a halogen atom;

R1′=H; Alkyl or (C2-C10)Alkyl wherein (C2-C10)Alkyl is substituted by one or more —NRR′, —OH, OAlkyl, CF 3 ; a halogen atom;

n=0 or 1;

X=linear Alkyl;

m=0 or 1;

Y=linear Alkyl;

R2′ and R3′, identical or different, are independently chosen from H; Alkyl or (C2-C10)Alkyl wherein (C2-C10)Alkyl is substituted by one or more —OH, —NRR′, —OAlkyl, CF 3 ;

R8=H; OAlkyl; O(C2-C10)Alkyl wherein (C2-C10)Alkyl is substituted by one or more —NRR′, —OH, OAlkyl, CF 3 ; a halogen atom;

R12=H; Alkyl optionally substituted by one or more —NRR′, —OH, OAlkyl, CF 3 ,

 wherein X, R1′, R2′, R3′, Y, m, n are defined as above;

R, R′, identical or different, represent independently H, Alkyl or (C2-C10)Alkyl wherein (C2-C10)Alkyl is substituted by one or more —NRR′, —OH, OAlkyl, CF 3 ;

or their acceptable salts, hydrates, or hydrated salts, or the polymorphic crystalline structures of these compounds or their optical isomers, racemates, diastereomers or enantiomers and

detecting complexes formed between the compound of formula (I) and the DNA.

5. A DNA labelling solution comprising a compound of formula (I)

as defined in claim 4

or their acceptable salts, hydrates, or hydrated salts, or the polymorphic crystalline structures of these compounds or their optical isomers, racemates, diastereomers or enantiomers,

in a suitable labelling solvent.

6. An in vivo and/or in vitro method for detecting DNA in a test sample which comprises the steps consisting of:

a) contacting a test sample with a derivative of formula (I)

as defined in claim 4

or their acceptable salts, hydrates, or hydrated salts, or the polymorphic crystalline structures of these compounds or their optical isomers, racemates, diastereomers or enantiomers;

b) incubating the mixture resulting from the contacting of the test sample and derivative of formula (I), for a time and under conditions sufficient for the derivative of formula (I) to form a complex with a DNA likely to be present in the test sample;

c) illuminating the mixture with an appropriate wavelength and observing the light emitted by the illuminated mixture, whereby the DNA is detected.

7. The method according to claim 6 , which is quantitative and wherein the light emitted by the illuminated mixture is correlated with the amount of DNA in the test sample.

8. The method according to claim 6 , wherein the test sample is a biological sample.

9. The method according to claim 8 , wherein the test sample is selected from the group consisting of urine, sera, blood, plasma, cerebrospinal fluid, saliva, tear fluid, mucus, tissues optionally fixed or immobilized, eukaryotic or prokaryotic cells optionally fixed or immobilized, a cell lysate, microorganism an electrophoretic matrix or polymeric gel, or a buffered solution.

10. The method according to claim 6 , wherein the DNA is synthetic DNA.

11. The method according to claim 6 , wherein the compound of formula (I) chosen from:

N′-(2,8-dimethoxy-12-methyl-dibenzo[c,h][1,5]naphthyridin-6-yl)-N,N-dimethyl-propane-1,3-diamine,

N′-Dibenzo[c,h][1,5]naphthyridin-6-ylmethyl-N,N-diethyl-propane-1,3-diamine,

2-[2-(Dibenzo[c,h][1,5]naphthyridin-6-y)amino)-ethylamino]-ethanol,

N′-Dibenzo[c,h][1,5]naphthyridin-6-yl-N,N-dimethyl-ethane-1,3-diamine,

N′-Dibenzo[c,h][1,5]naphthyridin-6-ylmethyl-N,N-dimethyl-ethane-1,3-diamine,

N′-dibenzo[c,h][1,5]naphthyridin-6-ylmethyl-N,N-dimethyl-propane-1,2-diamine,

N′-dibenzo[c,h][1,5]naphthyridin-6-yl-methylamino-2-methyl-propane-1,3-diol,

N′-(2-methoxy-12-methyl-dibenzo[c,h][1,5]naphthyridin-6-yl)-N,N-dimethyl-propane-1,3-diamine,

N6,N12-bis-(2-dimethylamino-ethyl)-2-methoxy-dibenzo[c,h][1,5]naphthyridin-6,12-diamine,

N6,N12-bis-(3-dimethylamino-propyl)-2-methoxy-dibenzo[c,h][1,5]naphthyridine-6,12-diamine,

N,N′-bis-(3-dimethylaminopropyl)-2,8-dimethoxy-dibenzo[c,h][1,5]naphthyridin-6,12-diamine,

N-(2,8-dimethoxy-12-methyl-dibenzo[c,h][1,5]naphthyridin-6-yl)-N,N-dimethyl-ethane-1,3-diamine,

N[I]-(2,8-dimethoxy-dibenzo[c,h][1,5]naphthyridin-6-yl)-N,N-dimethyl-ethane-1,3-diamine,

N,N′-bis-(3-dimethylamino-ethyl)-2,8-dimethoxy-dibenzo[c,h][1,5]naphthyridin-6,12-diami[pi]e,

or their acceptable salts, hydrates, or hydrated salts, or the polymorphic crystalline structures of these compounds or their optical isomers, racemates, diastereomers or enantiomers.

12. A kit for labelling DNA comprising:

a labelling solvent, and

a compound of formula (I)

as defined in claim 4 ,

or their acceptable salts, hydrates, or hydrated salts, or the polymorphic crystalline structures of these compounds or their optical isomers, racemates, diastereomers or enantiomers.

13. The kit according to claim 12 , wherein the labelling solvent selected from the group consisting of an aqueous solvent, a buffer solution, and an organic solvent.

14. The kit according to claim 12 , wherein the labelling solvent further comprises a detergent and/or stabilizer.