Patent ID: 7968735

Claim:
A compound of general formula (I): S—B-A in which: S represents a labile structure that can be activated by a biological entity, and S having the general formula (VI): P-L-□ in which: □ symbolizes a covalent bond with B; P represents a substrate that can be recognized by the biological entity; and L represents an oxygen, sulfur, nitrogen, carbonyl or a —CO-Q- functional group, with Q being O, S or NH; B is a reactive branch, of which the chemical structure is such that the activation of the labile structure S induces intramolecular rearrangement in a suitable form for releasing a molecule A − ; and B having the general formula (III): in which: □ and ⋄ symbolize, respectively, a covalent bond with the labile structure S and a chromophore A; j is an integer ranging from 0 to 2; R 4 is a C 1 -C 20 hydrocarbon-based chain, where appropriate interrupted by one or more heteroatoms and/or space —CO and/or —N(alkyl)-unit(s), located ortho, meta or para to the □-(CH 2 ) j -radical, and chosen from —(CH 2 ) k -⋄, —(CH 2 ) k —C(O)-⋄, and —CH 2 —O—C(O)—N(CH 3 )—(CH 2 ) 2 —N(CH 3 )—C(O)-⋄ radicals, with k being equal to 1 or 2; R 5 and R 6 are, independently of one another, a hydrogen atom or a saturated or unsaturated, linear, branched or cyclic, C 1 -C 20 hydrocarbon-based chain chosen from an alkyl radical, an alkoxy radical, an alkylamino or dialkylamino radical, an alkylthio and a C 6 -C 30 aromatic ring chosen from an aryl radical, an aryloxy radical, an arylamino radical and an arylthio radical A is a chromophore of formula (IIa): in which: ⋄ symbolizes the covalent bond with B; R 1 is a saturated or unsaturated, linear, branched or cyclic, C 1 -C 6 alkyl or C 1 -C 6 alkoxy radical, optionally comprising one or more atoms chosen from O, N and S, and is optionally substituted; R 2 and R 3 are linked to form a spiro adamantyl radical with the carbon of the dioxetane ring which bears R 2 and R 3 substituted where appropriate; Ar represents a C 6 -C 30 arylene radical of general formula (IVa): in which: Δ symbolizes a covalent bond with X and * symbolizes a covalent bond with the dioxetane ring; R 10 represents a hydrogen atom, an electroactive radical or a fluorescent radical; and R 11 is chosen from a hydrogen atom and a C 6 -C 10 aryl radical fused with the phenylene radical, and X represents O, NH or S; and derivatives thereof.