Gambini, Luca’s team published research in Journal of Medicinal Chemistry in 2019 | CAS: 138472-22-7

(S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-3-(4-sulfophenyl)propanoic acid(cas: 138472-22-7) belongs to ethers.The C-O bonds that comprise simple ethers are strong. They are unreactive toward all but the strongest bases. Although generally of low chemical reactivity, they are more reactive than alkanes. Reference of (S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-3-(4-sulfophenyl)propanoic acid

Reference of (S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-3-(4-sulfophenyl)propanoic acidOn June 13, 2019, Gambini, Luca; Baggio, Carlo; Udompholkul, Parima; Jossart, Jennifer; Salem, Ahmed F.; Perry, J. Jefferson P.; Pellecchia, Maurizio published an article in Journal of Medicinal Chemistry. The article was 《Covalent Inhibitors of Protein-Protein Interactions Targeting Lysine, Tyrosine, or Histidine Residues》. The article mentions the following:

We have recently reported a series of Lys-covalent agents targeting the BIR3 domain of the X-linked inhibitor of apoptosis protein (XIAP) using a benzamide-sulfonyl fluoride warhead. Using XIAP as a model system, we further investigated a variety of addnl. warheads that can be easily incorporated into binding peptides and analyzed their ability to form covalent adducts with lysine and other amino acids, including tyrosine, histidine, serine, and threonine, using biochem. and biophys. assays. Moreover, we tested aqueous, plasma stability, cell permeability, and cellular efficacy of the most effective agents. These studies identified aryl-fluoro sulfates as likely the most suitable electrophiles to effectively form covalent adducts with Lys, Tyr, and His residues, given that these agents were cell permeable and stable in aqueous buffer and in plasma. Our studies contain a number of general findings that open new possible avenues for the design of potent covalent protein-protein interaction antagonists. In the experimental materials used by the author, we found (S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-3-(4-sulfophenyl)propanoic acid(cas: 138472-22-7Reference of (S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-3-(4-sulfophenyl)propanoic acid)

(S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-3-(4-sulfophenyl)propanoic acid(cas: 138472-22-7) belongs to ethers.The C-O bonds that comprise simple ethers are strong. They are unreactive toward all but the strongest bases. Although generally of low chemical reactivity, they are more reactive than alkanes. Reference of (S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-3-(4-sulfophenyl)propanoic acid

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem