Photocleavable derivatives of hydroxyprenesulfonic acids
First Claim
1. A compound of the formula ##STR13## wherein at least one of X, Y, and Z is --SO3 H or --SO3 --SALT;
- the remainder of X, Y and Z are independently --SO3 H, --SO3 --SALT, --OH, or H;
where SALT is an alkali metal cation, ammonium, alkylammonium, polyalkylammonium, alkoxyammonium, or polyalkoxyammonium ion, the alkyl portions of each independently containing 1-6 carbon atoms;
LINK is either --O-- or --O--(C═
O)--O--;
and BLOCK is described by the formula ##STR14## where R1 is hydrogen, carboxylate (--CO2 H), an alkyl group having 1-6 carbons, or ARYL;
wherein ARYL is an unsubstituted phenyl, or phenyl substituted independently one or more times by --NO2, --OR3, where R3 is an alkyl having 1-6 carbons;
or --(CH)n --CO2 --M, where n=0-3 and M is Li+, Na+, K+, or NH4+ ;
the remaining positions on the aromatic ring A are optionally independently substituted one or more times by --NO2, or --OR3 ;
or two adjacent positions on aromatic ring A, taken in combination, form a fused 6 membered ring to give a naphthyl structure;
or substituents on two adjacent positions on aromatic ring A, taken in combination, form a methylenedioxy structure;
or BLOCK is described by the formula ##STR15## where the remaining positions on aromatic rings B and C are optionally independently substituted one or more times by halogen, --NO2, --OR4, and --NR5 R6, where R4, R5 and R6 are independently alkyl groups having 1-6 carbons;
or LINK is --O-- and BLOCK is described by the formula ##STR16## wherein R7 is H or Me; and
R2 is H, --OH, --OR4, or --NR5 R6.
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Abstract
The invention describes the synthesis and use of photoactivated (or caged) fluorescent dyes. Upon illumination at less than about 400 nm the caged dyes release highly fluorescent, water soluble hydroxypyrenesulfonic acid dyes according to the following equation: ##STR1## X, Y, and Z are independently sulfonic acid, a sulfonic acid salt, a hydroxyl group, or hydrogen, with at least one of X, Y, and Z being a sulfonic acid or sulfonic acid salt. LINK is either an ether linkage or a carbonate linkage. BLOCK is a caging group whose photolysis results in liberation of a free hydroxypyrenesulfonic acid dye.
The caged fluorescent dyes are useful for application in aqueous solutions, including fluids of biological origin. The caged dyes of the present invention are especially useful for flow tagging velocimetry.
27 Citations
17 Claims
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1. A compound of the formula ##STR13## wherein at least one of X, Y, and Z is --SO3 H or --SO3 --SALT;
- the remainder of X, Y and Z are independently --SO3 H, --SO3 --SALT, --OH, or H;
where SALT is an alkali metal cation, ammonium, alkylammonium, polyalkylammonium, alkoxyammonium, or polyalkoxyammonium ion, the alkyl portions of each independently containing 1-6 carbon atoms;LINK is either --O-- or --O--(C═
O)--O--;and BLOCK is described by the formula ##STR14## where R1 is hydrogen, carboxylate (--CO2 H), an alkyl group having 1-6 carbons, or ARYL; wherein ARYL is an unsubstituted phenyl, or phenyl substituted independently one or more times by --NO2, --OR3, where R3 is an alkyl having 1-6 carbons;
or --(CH)n --CO2 --M, where n=0-3 and M is Li+, Na+, K+, or NH4+ ;the remaining positions on the aromatic ring A are optionally independently substituted one or more times by --NO2, or --OR3 ;
or two adjacent positions on aromatic ring A, taken in combination, form a fused 6 membered ring to give a naphthyl structure;
or substituents on two adjacent positions on aromatic ring A, taken in combination, form a methylenedioxy structure;or BLOCK is described by the formula ##STR15## where the remaining positions on aromatic rings B and C are optionally independently substituted one or more times by halogen, --NO2, --OR4, and --NR5 R6, where R4, R5 and R6 are independently alkyl groups having 1-6 carbons; or LINK is --O-- and BLOCK is described by the formula ##STR16## wherein R7 is H or Me; and
R2 is H, --OH, --OR4, or --NR5 R6. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- the remainder of X, Y and Z are independently --SO3 H, --SO3 --SALT, --OH, or H;
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11. A mixture comprising an aqueous solution of a photoactive compound of the formula ##STR23## wherein at least one of X, Y, and Z is --SO3 H or --SO3 --SALT;
- the remainder of X, Y and Z are independently --SO3 H, --SO3 --SALT, --OH, or H;
where SALT is an alkali metal cation, ammonium, alkylammonium, polyalkylammonium, alkoxyammonium, or polyalkoxyammonium ion, the alkyl portions of each independently containing 1-6 carbon atoms;LINK is either --O-- or --O----(C═
O)--O--;and BLOCK is described by the formula ##STR24## where R1 is hydrogen, carboxylate (--CO2 H), an alkyl group having 1-6 carbons, or ARYL; wherein ARYL is an unsubstituted phenyl, or phenyl substituted independently one or more times by --NO2, --OR3, where R3 is an alkyl having 1-6 carbons;
or --(CH)n --CO2 --M, where n=0-3 and M is Li+, Na+, K+, or NH4+ ;the remaining positions on the aromatic ring A are optionally independently substituted one or more times by --NO2, --OR3, or --(CH)n --CO2 --M;
or two adjacent positions on aromatic ring A, taken in combination, form a fused 6 membered ring to give a naphthyl structure;
or substituents on two adjacent positions on aromatic ring A, taken in combination, form a methylenedioxy structure;or BLOCK is described by the formula ##STR25## where the remaining positions on aromatic rings B and C are optionally independently substituted one or more times by halogen, --NO2, --OR4, and --NR5 R6, where R4, R5 and R6 are independently alkyl groups having 1-6 carbons; or LINK is --O-- and BLOCK is described by the formula ##STR26## wherein R7 is H or Me; and
R2 is H, --OH, --OR4, or --NR5 R6 ;wherein the concentration of said compound is greater than 10 nanogram per milliliter and less than 10 milligrams per milliliter. - View Dependent Claims (12, 13, 14, 15, 16, 17)
- the remainder of X, Y and Z are independently --SO3 H, --SO3 --SALT, --OH, or H;
Specification