Aug 2026· Journal of Medicinal Chemistry· Vol 69 17, pp.
21018-21043
· 0 citations· 52 references
Medicine
TL;DR
This study establishes an efficient multicomponent strategy for PROTAC synthesis and highlights key structure-degradation relationships in HDAC6 degraders.
Abstract
This work reports on the development of selective histone deacetylase 6 (HDAC6) degraders based on a peptoid scaffold. Structure-based design identified the isocyanide-derived cap region as suitable exit vector for linker attachment, enabling rapid generation of CRBN-recruiting PROTACs via the Ugi four-component reaction. A focused library of 12 degraders revealed a strong dependence of activity on linker composition, with octyl-linked compounds (9e-h) showing the strongest HDAC6 degradation with half-maximal degradation values of 17-36 nM in kinetic HDAC6 degradation assays. The lead compounds selectively degraded HDAC6 in MM.1S and MV4-11 cells without affecting class I HDACs and demonstrated clean proteomic profiles. Functionally, compounds 9e and 9f displayed submicromolar antiproliferative activity against FLT3-ITD-mutated acute myeloid leukemia cells and suppressed proinflammatory signaling in immune cells. Both effects were associated in part with residual class I HDAC inhibition. Overall, this study establishes an efficient multicomponent strategy for PROTAC synthesis and highlights key structure-degradation relationships.
A “2-in-1” PROTAC design strategy for developing more compact HDAC8 degraders by integrating the CRBN-recruiting ligand into the capping group of an HDAC8 warhead, thereby enabling a single structural motif to engage both HDAC8 and CRBN.
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Lili Jiang, Wenyan Yang, Yan-Qing Liu et al.· European Journal of Pharmace...· 0 citations
TFMO-oxime ethers are identified as promising scaffolds for HDAC-targeted fungicide discovery in Pseudomonas aeruginosa HDAC, and most derivatives showed potent inhibitory activity against Pa-HDAC.
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