Thalidomide-NH-C4-NH2 TFA (compound 29c) is an E3 ligase ligand-linker conjugate, and incorporates the Thalidomide based cereblon ligand and a linker. Thalidomide-NH-C4-NH2 TFA is used in PROTAC BRD2/BRD4 degrader-1 . PROTAC BRD2/BRD4 degrader-1 is a potent and selective BET protein BRD4 and BRD2 degrader[1].
[1]. Jiang F, et al. Discovery of novel small molecule induced selective degradation of the bromodomain and extra-terminal (BET) bromodomain protein BRD4 and BRD2 with cellular potencies. Bioorg Med Chem. 2020 Jan 1;28(1):115181.