On May 31, 2018, Bradner, James; Buckley, Dennis; Ishoey, Mette; Winter, Georg published a patent.Name: 2-(2,6-Dioxopiperidin-3-yl)-1,3-dioxoisoindoline-5-carboxylic acid The title of the patent was Degradation of protein kinases by conjugation of protein kinase inhibitors with E3 ligase ligand and methods of use. And the patent contained the following:
The present invention provides bifunctional compounds Targeting Ligand-Linker-Degron [I; the Targeting Ligand (TL) is capable of binding to one or more protein kinases (TL = II [X1 = NR5 or O; each R1 and each R4 = (independently) alkyl, haloalkyl, alkoxy, etc.; R2 and R3 = (independently) H, alkyl, or haloalkyl; R5 = H, alkyl, haloalkyl, or C(O)alkyl; n1 = 0-3; n2 = 0-2], III [A = (un)substituted aryl or 5-6 membered heteroaryl comprising 1-3 heteroatoms selected from N, S, and O; X2 = O, S, or NR10; X3 = N or CR11; each R6 = (independently) alkyl, haloalkyl, alkoxy, etc.; R7 = H, alkyl, or haloalkyl; each R8 and each R9 = (independently) alkyl, haloalkyl, alkoxy, etc.; R10 = H or alkyl; R11 = alkyl, haloalkyl, alkoxy, etc.; q1 = 0-4; q2 = 0-3], etc.); the Linker is a group that covalently binds to the Targeting Ligand and the Degron; and the Degron is capable of binding to a ubiquitin ligase] or enantiomers, diastereomers, or stereoisomers thereof, or pharmaceutically acceptable salts, hydrates, solvates, or prodrugs thereof, which act as protein degradation inducing moieties for protein kinases. Fifteen compounds I [TL = II] were prepared Thus, amidating N-(4-aminobutyl)-2-((2-(2,6-dioxopiperidin-3-yl)-1,3-dioxoisoindolin-4-yl)oxy)acetamide with Sunitinib acid afforded 36% IV. The present application also relates to methods for the targeted degradation of one or more protein kinases through the use of the bifunctional compounds I that link a ubiquitin ligase-binding moiety to a ligand that is capable of binding to one or more protein kinases which can be utilized in the treatment of disorders modulated by protein kinases. Exemplified compounds I were tested in the dose-ranging viability assays (data given for representative compounds I). Pharmaceutical composition comprising compound I was disclosed. The experimental process involved the reaction of 2-(2,6-Dioxopiperidin-3-yl)-1,3-dioxoisoindoline-5-carboxylic acid(cas: 1216805-11-6).Name: 2-(2,6-Dioxopiperidin-3-yl)-1,3-dioxoisoindoline-5-carboxylic acid
The Article related to bifunctional compound preparation protein degradation inducer ubiquitin ligase binding, antitumor bifunctional compound preparation e3 ubiquitin ligase binding moiety, Heterocyclic Compounds (One Hetero Atom): Pyridines and other aspects.Name: 2-(2,6-Dioxopiperidin-3-yl)-1,3-dioxoisoindoline-5-carboxylic acid
Referemce:
Piperidine – Wikipedia,
Piperidine | C5H11N – PubChem