Baran Lab at Scripps Research (USA) Adopts Our Diaphragm-Free Plate-and-Frame Electrolysis Cell for Lab Scale; Research Findings Published in Angewandte Chemie

Times:2026-07-06 15:25 Popularity:2

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Article Abstract

Targeted protein degradation technologies (such as PROTACs and CELMoDs) represent cutting-edge therapeutics for cancer, neurodegenerative diseases and other disorders. However, conventional synthetic routes for their core structural glutarimide bearing C3(sp³)-C(sp²) linkages rely on multi-step, high-cost palladium-catalyzed processes with low yields ranging only from 4% to 75%.

In their latest research published in Angewandte Chemie, the group led by Prof. Phil S. S. Baran at Scripps Research developed a nickel electrocatalytic cross-coupling (GCC) strategy. Using our diaphragm-free lab-scale plate-and-frame electrolyzer, the team realized the direct cross-coupling of α-bromoglutarimides with (hetero)aryl halides for the first time, delivering a single-step yield up to 84%. This breakthrough opens a brand-new route for the development of protein degraders.

Four Core Technical Advantages

Single-step synthesis: The traditional 2–4 step workflow is condensed into one single step, cutting costs by over 50% (catalyst cost reduced from $5.00/g to $0.02/g).

✅ Green and high-efficiency: Reactions proceed at room temperature without rigorous oxygen/water exclusion, greatly improving atom economy.

✅ Broad substrate compatibility: Successfully applied to the synthesis of precursors for 23 known protein degraders, including clinical candidate molecules such as pomalidomide derivatives.

✅ Scalable performance: Gram-scale preparation is achievable via batch or flow chemistry, fully compatible with industrialization requirements.

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Introduction to Diaphragm-Free Plate-and-Frame Electrolyzer


The assembled lab-scale diaphragm-free plate-and-frame electrolyzer (Model HZC-501) measures 120×90×180 mm (width subject to actual dimensions). Constructed from polytetrafluoroethylene (PTFE), the main body resists corrosion by acids, alkalis and most organic solvents.
The cathode adopts titanium mesh, while the anode is a dimensionally stable anode (DSA) with coated titanium mesh substrate. The gap between cathode and anode is approximately 4 mm, with an effective electrode reaction area of around 1 dm². Supporting components include glass circulation tanks, corrosion-resistant magnetic pumps and PTFE pipelines; the fully assembled cell achieves zero liquid leakage. The unit allows easy disassembly, assembly and electrode replacement, enabling flexible switching of electrodes for different reaction systems with versatile adaptability.
The narrow inter-electrode gap effectively reduces ohmic drop in electrolyte. The large effective electrode area supports electrolysis under high current densities. Meanwhile, rapid circulation of electrolyte between cathode and anode compartments accelerates mass transport on electrode surfaces. Serving as lab-scale equipment prior to pilot trials, this electrolyzer generates experimental data with high practical application value.
Scaled down from single-chamber industrial electrolyzers, this lab diaphragm-free plate-and-frame cell is ideal for applied research projects. It facilitates systematic investigation of variables including temperature, substrate properties, electrode materials and hydrodynamics, making it essential lab equipment before pilot-scale production.

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