Sulfonamide derivatives of xanthene compounds

1. At least one compound of formula I or formula II

wherein

R 1 and R 2 are the same or different and are independently selected from the group consisting of —H, —C 1 -C 18 -alkyl or -ω-sulfoalkyl;

X and Y are the same or different and are independently selected from the group consisting of —O − , —OH, —SH, —NH—NH 2 , —F, —Cl, —Br, —I, —O-Su (succinimidyl/sulfosuccinimidyl), —O-STP (4-sulfo-2,3,5,6-tetrafluorophenyl), —O-TFP (2,3,5,6-tetrafluorophenyl), —O-benzotriazole, -benzotriazole, —NR—CO—CH 2 —I, —NR 2 , —NR-biomolecule, —NR-L-COO − , —NR-L-COOH, —NR-L-COO-Su, —NR-L-COO-STP, —NR-L-COO-TFP, —NR-L-CONR 2 , —NR-L-CO-biomolecule, —NR-L-CO—NH—NH 2 , —NR-L-OH, —NR-L-O-phosphoramidite, —NR-L-CHO, —NR-L-maleimid, or —NR-L-NH—CO—CH 2 —I; where R is equal to R 1 and R 2 and L is selected from the group consisting of a divalent linear (—(CH 2 ) o —, o=1 to 15), crossed, or cyclic alkane group that can be substituted by at least one atom selected from the group consisting of oxygen, substituted nitrogen, and/or sulfur, and the biomolecule is a protein, antibody, nucleotide, oligonucleotide, biotin, or hapten;

Z is —O − or OH;

U is —O − , —OH or NH-L-SO 2 Z;

Kat is Li, Na, K, ammonium (mono-, di- or trialkyl) or another cation;

An is F, Cl, Br, I, BF 4 , ClO 4 , CH 3 CO 2 , CF 3 CO 2 or another anion;

m is an integer from 1-6 necessary to compensate the negative or positive charge from the dye moiety in formula I or formula II; and

n is an integer from 0-12.

2. A compound selected from at least one of formula III, formula IV, formula V, formula VI, formula VII, formula VIII, formula IX, formula X, formula XI, formula XII, formula XIII, formula XIV, formula XV, or formula XVI

3. A biocompatible dye composition comprising at least one excipient and a compound selected from at least one of formula I or formula II

resulting in a biocompatible dye composition, wherein

R 1 and R 2 are the same or different and are independently selected from the group consisting of —H, —C 1 -C 18 -alkyl or -ω-sulfoalkyl;

X and Y are the same or different and are independently selected from the group consisting of —O − , —OH, —SH, —NH—NH 2 , —F, —Cl, —Br, —I, —O-Su (succinimidyl/sulfosuccinimidyl), —O-STP (4-sulfo-2,3,5,6-tetrafluorophenyl), —O-TFP (2,3,5,6-tetrafluorophenyl), —O-benzotriazole, -benzotriazole, —NR—CO—CH 2 —I, —NR 2 , —NR-biomolecule, —NR-L-COO − , —NR-L-COOH, —NR-L-COO-Su, —NR-L-COO-STP, —NR-L-COO-TFP, —NR-L-CONR 2 , —NR-L-CO-biomolecule, —NR-L-CO—NH—NH 2 , —NR-L-OH, —NR-L-O-phosphoramidite, —NR-L-CHO, —NR-L-maleimid, or —NR-L-NH—CO—CH 2 —I; where R is equal to R 1 and R 2 and L is selected from the group consisting of a divalent linear (—(CH 2 ) o —, o=1 to 15), crossed, or cyclic alkane group that can be substituted by at least one atom selected from the group consisting of oxygen, substituted nitrogen, and/or sulfur, and the biomolecule is a protein, antibody, nucleotide, oligonucleotide, biotin, or hapten;

Z is —O − or OH;

U is —O − , —OH or NH-L-SO 2 Z;

Kat is Li, Na, K, ammonium (mono-, di- or trialkyl) or another cation;

An is F, Cl, Br, I, BF 4 , ClO 4 , CH 3 CO 2 , CF 3 CO 2 or another anion;

m is an integer from 1-6 necessary to compensate the negative or positive charge from the dye moiety in formula I or formula II; and

n is an integer from 0-12.

4. A biocompatible dye composition comprising at least one excipient and a compound selected from the group consisting of formula III, formula IV, formula V, formula VI, formula VII, formula VIII, formula IX, formula X, formula XI, formula XII, formula XIII, formula XIV, formula XV, formula XVI, and combinations thereof, resulting in a biocompatible dye composition, wherein

5. A method of labelling at least one biomolecule, the method comprising

providing a composition comprising at least one excipient and a compound of at least one of formula I or formula II

in an effective concentration to a biomolecule under conditions sufficient for conjugating the compound to the biomolecule, and

detecting the biomolecule-bound conjugate, wherein

R 1 and R 2 are the same or different and are independently selected from the group consisting of —H, —C 1 -C 18 -alkyl or -ω-sulfoalkyl;

X and Y are the same or different and are independently selected from the group consisting of —O − , —OH, —SH, —NH—NH 2 , —F, —Cl, —Br, —I, —O-Su (succinimidyl/sulfosuccinimidyl), —O-STP (4-sulfo-2,3,5,6-tetrafluorophenyl), —O-TFP (2,3,5,6-tetrafluorophenyl), —O-benzotriazole, -benzotriazole, —NR—CO—CH 2 —I, —NR 2 , —NR-biomolecule, —NR-L-COO − , —NR-L-COOH, —NR-L-COO-Su, —NR-L-COO-STP, —NR-L-COO-TFP, —NR-L-CONR 2 , —NR-L-CO-biomolecule, —NR-L-CO—NH—NH 2 , —NR-L-OH, —NR-L-O-phosphoramidite, —NR-L-CHO, —NR-L-maleimid, or —NR-L-NH—CO—CH 2 —I; where R is equal to R 1 and R 2 and L is selected from the group consisting of a divalent linear (—(CH 2 ) o —, o=1 to 15), crossed, or cyclic alkane group that can be substituted by at least one atom selected from the group consisting of oxygen, substituted nitrogen, and/or sulfur, and the biomolecule is a protein, antibody, nucleotide, oligonucleotide, biotin, or hapten;

Z is —O − or OH;

U is —O − , —OH or NH-L-SO 2 Z;

Kat is Li, Na, K, ammonium (mono-, di- or trialkyl) or another cation;

An is F, Cl, Br, I, BF 4 , ClO 4 , CH 3 CO 2 , CF 3 CO 2 or another anion;

m is an integer from 1-6 necessary to compensate the negative or positive charge from the dye moiety in formula I or formula II; and

n is an integer from 0-12.

6. A method of labelling at least one biomolecule, the method comprising

providing a composition comprising at least one excipient and a compound of at least one of formula III, formula IV, formula V, formula VI, formula VII, formula VIII, formula IX, formula X, formula XI, formula XII, formula XIII, formula XIV, formula XV, formula XVI, and combinations thereof, in an effective concentration to a biomolecule under conditions sufficient for conjugating the compound to the biomolecule, and

detecting the biomolecule-bound conjugate, wherein

7. The method of either claim 5 or claim 6 used in at least one of a protein assay, immunofluorescence assay, singleplex application, or multiplex application.

8. The method of either claim 5 or claim 6 used in a multiplex application in combination with other fluorescent dyes or conjugates.

9. The method of either claim 5 or claim 6 wherein the compound is rendered reactive prior to conjugation.

10. The method of either claim 5 or claim 6 wherein the compound further comprises L-Rt where L is a linker group covalently attached to the compound and Rt is a reactive group that is capable of covalently linking to the biomolecule.

11. The method of either claim 5 or claim 6 wherein the biomolecule is selected from at least one of a protein, antibody, nucleotide, oligonucleotide, biotin, or hapten.

12. The compound of formula V (V03-04115)

in a composition capable of use as a fluorescent dye in a biological assay.

13. The compound of claim 12 detected as a biomolecule conjugate.

14. The compound of claim 12 in a kit with instructions for use in a protein assay.