Hydrazinyl-indole compounds and methods for producing a conjugate
The present disclosure provides conjugate structures (e.g., polypeptide conjugates) and hydrazinyl-indole compounds used to produce these conjugates. The disclosure also provides methods of production of such conjugates, as well as methods of using the same.
1. A method of producing a conjugate, the method comprising:
combining in a reaction mixture:
(i) a compound of formula (IV):
wherein
Q 2 is Y 4 ;
Q 3 is —(CH 2 ) n NR 3 NHR 2 ;
n is 0 or 1;
R 2 and R 3 are each independently selected from hydrogen, alkyl, substituted alkyl, alkenyl, substituted alkenyl, alkynyl, substituted alkynyl, alkoxy, substituted alkoxy, amino, substituted amino, carboxyl, carboxyl ester, acyl, acyloxy, acyl amino, amino acyl, alkylamide, substituted alkylamide, sulfonyl, thioalkoxy, substituted thioalkoxy, aryl, substituted aryl, heteroaryl, substituted heteroaryl, cycloalkyl, substituted cycloalkyl, heterocyclyl, and substituted heterocyclyl;
X 1 is C or N, wherein if X 1 is N, then Y 1 is absent;
X 2 , X 3 and X 4 are each C;
Y 1 , Y 2 , Y 3 and Y 4 are each independently selected from hydrogen, halogen, alkyl, substituted alkyl, alkenyl, substituted alkenyl, alkynyl, substituted alkynyl, alkoxy, substituted alkoxy, amino, substituted amino, carboxyl, carboxyl ester, acyl, acyloxy, acyl amino, amino acyl, alkylamide, substituted alkylamide, sulfonyl, thioalkoxy, substituted thioalkoxy, aryl, substituted aryl, heteroaryl, substituted heteroaryl, cycloalkyl, substituted cycloalkyl, heterocyclyl, and substituted heterocyclyl;
L is an optional linker; and
W 1 is selected from a drug and a detectable label; and
(ii) an antibody comprising a reactive group,
wherein the combining is under reaction conditions suitable to promote reaction between the compound and the reactive group of the antibody compound to form a conjugate; and
(iii) isolating the conjugate from the reaction mixture.
2. The method of claim 1 , wherein W 1 is the drug.
3. The method of claim 1 , wherein the reactive group comprises a reactive aldehyde group or a reactive ketone group.
4. The method of claim 1 , wherein the reaction mixture comprises water.
5. The method of claim 1 , wherein the reaction mixture has a pH of 7.
6. The method of claim 1 , wherein the reaction conditions are at a temperature of 37° C.
7. A pharmaceutical composition comprising:
a conjugate produced by the method of claim 1 ; and
a pharmaceutically acceptable excipient.
8. The method of claim 1 , wherein n is 1.
9. The method of claim 1 , wherein R 2 and R 3 are each independently selected from alkyl and substituted alkyl.
10. The method of claim 1 , wherein R 2 and R 3 are each methyl.
11. The method of claim 1 , wherein X 1 , X 2 , X 3 and X 4 are each C.
12. The method of claim 1 , wherein Y 1 , Y 2 , Y 3 and Y 4 are each H.
13. The method of claim 1 , wherein L is present and comprises a group selected from alkyl, substituted alkyl, alkenyl, substituted alkenyl, alkynyl, substituted alkynyl, alkoxy, substituted alkoxy, amino, substituted amino, carboxyl, carboxyl ester, acyl amino, alkylamide, substituted alkylamide, aryl, substituted aryl, heteroaryl, substituted heteroaryl, cycloalkyl, substituted cycloalkyl, heterocyclyl, and substituted heterocyclyl.
14. The method of claim 1 , wherein L is present and comprises a polymer.
15. The method of claim 14 , wherein the polymer is a polyethylene glycol.
16. The method of claim 1 , wherein the detectable label comprises a fluorophore.
17. The method of claim 2 , wherein the compound is a compound of formula (V):
18. The method of claim 2 , wherein the compound is a compound of formula (Va):
19. The method of claim 1 , wherein the antibody is an antibody specific for CD22.