Dibenzoxanthene Quenchers, Uses, and Methods of Preparation
AssigneeLife Technologies Corporation
InventorsAndrew Levitz, Scott Benson, Brian Evans, Khairuzzaman Bashar Mullah
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Abstract
The present disclosure relates to dibenzoxanthene compounds that are efficient quenchers of fluorescence, for example in the far red and near infrared spectrum. Applications using the dibenzoxanthene quenching compounds and methods of making same are also described. Also disclosed is a method of detecting or quantifying a target nucleic acid molecule in a sample by polymerase chain reaction (PCR). The compounds have the following formula (I).
Claims39
A compound of Formula (I):
- wherein
- Y1 is selected from Y1′ and —C(O)R″,
- Y2 is selected from Y2′ and —C(O)R″ on the condition that Y1 and Y2 are not both —C(O)R″;
- or, alternatively, Y1 and Y2 form N═NR′ with the nitrogen to which they are bound;
- or, alternatively, Y1′ forms a saturated or unsaturated, substituted or unsubstituted ring with R1/R11 together with the atoms to which they are bonded, and/or Y2′ forms a saturated or unsaturated, substituted or unsubstituted ring with R1/R11 together with the atoms to which they are bonded;
- Y3 is selected from Y3′ and —C(O)R″,
- Y4 is selected from Y4′ and —C(O)R″ on the condition that Y3 and Y4 are not both —C(O)R″;
- or, alternatively, Y3′ forms a saturated or unsaturated, substituted or unsubstituted ring with R4/R5 together with the atoms to which they are bonded, and/or Y4′ forms a saturated or unsaturated, substituted or unsubstituted ring with R4/R5 together with the atoms to which they are bonded;
- R″ is selected from —(CQ1Q2)x-Ra;
- wherein Q1 and Q2 are independently selected from hydrogen and methyl,
- x is an integer ranging from 1 to 10,
- Ra is a trimethyl quinone;
- R5, R6, R7, R9, R10, R11 are independently selected from —H, halogens, alkyl, and alkyl group independently substituted with one or more Z2;
- R1, R2, R3, R4, Y1′, Y2′, Y3′, Y4′, and R′ are independently selected from —H, alkyl, alkyl independently substituted with one or more Z2, heteroalkyl, heteroalkyl independently substituted with one or more Z2, aryl, aryl independently substituted with one or more Z2, heteroaryl, heteroaryl independently substituted with one or more Z2, arylalkyl, arylalkyl independently substituted with one or more Z2, heteroarylalkyl, heteroarylalkyl independently substituted with one or more Z2, halogen, —OS(O)2OR, —S(O)2OR, —S(O)2R, —S(O)2NR, —S(O)R, —OP(O)O2RR, —P(O)O2RR, —C(O)OR, —NO2, ═NRR, —NRR, —N+RRR, —NC(O)R, —C(O)R, —C(O)NRR, —CN, and —OR;
- wherein R is independently selected from —H, alkyl, heteroalkyl, aryl, heteroaryl, arylalkyl, and heteroarylalkyl;
- wherein Z2 is selected from —R, halogen, —OS(O)2OR, —S(O)2OR, —S(O)2R, —S(O)2NR, —S(O)R, —OP(O)O2RR—P(O)O2RR, —C(O)OR, —NO2, —NRR, —N+RRR, —NC(O)R, —C(O)R, —C(O)NRR, —CN, —O, —OR, —(CH2)x—Rb, —N(CH2)x—Rb;
- wherein Rb is selected from -halogen, —OH, —OR, —SH, —NH2, —C(O)O, —C(O)OH, —C(O)NH2;
- R8 is selected from —H, alkyl, alkyl independently substituted with one or more Z1, heteroalkyl, heteroalkyl independently substituted with one or more Z1, aryl, aryl independently substituted with one or more Z1, heteroaryl, heteroaryl independently substituted with one or more Z1, arylalkyl, arylalkyl independently substituted with one or more Z1, heteroarylalkyl, and heteroarylalkyl independently substituted with one or more Z1;
- and
- Z1 is selected from the group consisting of, —R*, halogen, —CR*R*R*, —OS(O)2OR*, —S(O)2OR*, —SO3, —S(O)2R*, —S(O)2NR*, —S(O)R*, —OP(O)O2R*R*—P(O)O2R*R*, —C(O)OR*, —N═N—R*—R*, —NO2—NR*R*, —N*R*R*R*, —NC(O)R*, —C(O)R*, —C(O)NR*R*, —CN, —O and —OR*, wherein R* is independently selected from —H, halogen, alkyl, heteroalkyl, —NO2, aryl, heteroaryl, arylalkyl, heteroarylalkyl, and linking group (LG).
A compound selected from Table Q and protected forms thereof.
A conjugate, comprising:
- a) a fluorescent donor compound, wherein the fluorescent donor compound emits light at a wavelength in the visible or near-infrared region of the electromagnetic spectrum upon excitation at an appropriate wavelength and having an initial fluorescence intensity,
- b) a quenching acceptor compound, wherein the quenching acceptor compound is a substituted 3-imino-3H-dibenzo[c,h]xanthen-11-amine, and
- c) a linking compound, wherein the fluorescent donor compound and the quenching acceptor compound are attached to the linking compound, wherein the distance between the donor compound and acceptor compound is such that upon excitation at the appropriate wavelength the initial fluorescence intensity of the fluorescent donor compound is reduced by a detectable amount.
Dependencies are inferred from the claim text.