Drug conjugates
View Patent ↗A compound having the formula Y-A-Z, wherein: A is a 5, 6, or 7 member ring that is monocyclic or is fused to 1 to 3 additional 4 to 8 member rings; wherein ring A and, independently, the fused additional rings are carbocyclic or heterocyclic, and saturated or unsaturated, wherein unsaturated rings are aromatic or non-aromatic; wherein Y and Z are substituents at adjacent positions on ring A; Y represents: Z represents: X and E represent O, S, or NR a or NR b ; each of a, b, c, d, e and f independently represents 0 or 1; a+c equals 0, 1, or 2; b+d equals 0, 1, or 2; a+b+c+d+e+f equals 1, 2, or 3; provided that when f is 1, then d is 1, and when d is 0, then f is 0; and when both e and b are 0, then neither R 1 nor R 2 is chloro or bromo; v represents 0 or 1, provided that when v is 0, then J is hydrogen, a metal ion, or a quaternary ammonium ion; and X is O and G is H; either G is hydrogen, a metal ion, a quaternary ammonium ion, lower alkyl, or comprised of a pharmaceutically active chemical compound or the precursor thereof; or X-G represents a carbonyl-activating group; J is lower alkyl, aryl, heteroaryl, omega-hydroxycarbonyl-(lower alkyl), omega-(lower alkoxy)carbonyl-(lower alkyl), omega-(X-G)-carbonyl-(lower alkyl) group, or comprised of a specific binding agent; and R a , R b , R 1 , R 2 , R 3 , R 4 are as defined in the specification.
1. A compound having the formula Y-A-Z, wherein:
A is a phenyl group;
wherein A is unsubstituted or substituted with 1 to 4 substituents selected from lower alkyl, hydroxy-(lower alkyl), amino-(lower alkyl), N-(lower alkyl)amino-(lower alkyl), N,N-di(lower alkyl)amino-(lower alkyl), hydroxylamino, O-(lower alkoxy)amino, fluoro, chloro, bromo, nitro, hydroxyl, lower alkoxy, amino, N-(lower alkyl)amino, or N,N-di(lower alkyl)amino;
Y and Z are substituents at adjacent positions on A;
Y represents:
wherein X is O or S;
Z represents:
R 1 and R 2 independently represent H or a lower alkyl;
G is a hydrogen, a lower alkyl, a metal ion or a quaternary ion;
J is omega-hydroxycarbonyl-(lower alkyl), omega-(lower alkoxy)carbonyl-(lower alkyl), or omega-(X-G)-carbonyl-(lower alkyl), wherein X-G represents a carbonyl activating group selected from the group consisting of hydroxybenzotriazole-1-oxy, succinimide-N-oxy, p-nitrophenoxy and pentafluorophenyloxy,
wherein lower means having 1-6 carbon atoms.
2. A compound according to claim 1 wherein R 1 and R 2 are H.
3. A compound according to claim 1 wherein R 1 and R 2 are methyl.
4. A compound according to claim 1 wherein one of R 1 and R 2 is H and the other of R 1 and R 2 is methyl.
5. A compound according to claim 1 wherein J is 2-hydroxycarbonylethyl, 2-methoxycarbonylethyl, p-nitrophenyloxycarbonylpropyl, pentafluorophenyloxycarbonylbutyl or 2-(succinimide-N-oxycarbonyl)- 1-methylpropyl.