COOH reactive

Here you will find TCO* and TCO click chemistry reagents for the functionalization of COOH groups, including NH2-functionalized reagents for coupling to carboxylic acids. The resulting TCO*- or TCO-functionalized molecules can be used for rapid SPIEDAC reactions with tetrazines in bioorthogonal labeling and bioconjugation.

Your compound contains COOH → you need an NH2-functionalized reagent.