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Updated: Dec 13, 2025

Author Spotlight: Evaluating Biophysical Assays for Characterizing PROTACS Ternary Complexes
Published on: January 12, 2024
A Buchwald-Hartwig Protocol to Enable Rapid Linker Exploration of Cereblon E3-Ligase PROTACs*
Thomas G Hayhow1, Rachel E A Borrows1, Coura R Diène1
1Medicinal Chemistry, Oncology R&D, Research and Early Development, AstraZeneca, Cambridge Science Park, Unit 310 Darwin Building, Cambridge, CB4 0WG, UK.
Abstract:
A palladium-catalysed Buchwald-Hartwig amination for lenalidomide-derived aryl bromides was optimised using high throughput experimentation (HTE). The substrate scope of the optimised conditions was evaluated for a range of alkyl- and aryl- amines and functionalised aryl bromides. The methodology allows access to new cereblon-based bifunctional proteolysis targeting chimeras with a reduced step count and improved yields.

