(S,R,S)-AHPC-O-PEG1-propargyl (Compound 10b) is an E3 ligand for the synthesis of PROTAC. (S,R,S)-AHPC-O-PEG1-propargyl is a click chemistry reagent, it contains an Alkyne group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing Azide groups.
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