Solid-Phase PSMA-617 Synthesis for High-Purity, Lower-Cost Production
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Solution Overview
Problem
There is a need for cost-effective synthesis methods that can deliver high-purity quantities of urea-based prostate specific membrane antigen (PSMA) ligands, particularly PSMA-617, which are crucial for the treatment of prostate cancer.
Innovation Solution
A method for synthesizing PSMA ligands using solid phase synthesis, involving a series of steps with resin-based compounds and specific protecting groups, linkers, and reagents, which allows for efficient and cost-effective production of PSMA-617.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional liquid-phase synthesis methods are used for PSMA ligands, then the synthesis can be performed with conventional techniques, but the production cost increases and purity decreases
Solution Approach 1:
The patent employs solid support (resin) as an intermediary carrier to attach the growing PSMA ligand chain during synthesis. This solid-phase approach allows for simplified purification by filtration, eliminating complex liquid-liquid extraction steps, thereby increasing purity while reducing production costs through easier manufacturing operations.
2Manufacturing precision
If multi-step synthesis procedures are used to ensure high purity, then the purity of PSMA ligands increases, but the production time and complexity increase
Solution Approach 1:
The synthesis is divided into discrete modular steps where amino acids are sequentially added to the growing chain on solid support. Each step can be independently optimized and monitored, allowing for high purity through controlled incremental assembly rather than requiring extensive post-synthesis purification steps, thus reducing overall production time.
Solution Approach 2:
The solid-phase synthesis allows continuous addition of amino acids and reagents to the resin-bound intermediate without isolating intermediates. The reaction mixture can be directly filtered and washed, maintaining continuous productive action throughout the synthesis process, thereby reducing production time while ensuring high purity through the inherent purification capability of the solid support.
3Productivity
If conventional synthesis methods are used, then the existing infrastructure can be utilized, but the yield and efficiency decrease
Solution Approach 1:
The solid support automatically performs purification functions through simple filtration and washing operations. The resin-bound intermediate self-organizes the synthesis process, allowing reagents to be added in excess without concern for side reactions, and the product is automatically purified during the filtration step, thereby increasing yield without requiring complex purification equipment or procedures.
Data Source
Figure 1
AI summary
The present disclosure relates to the synthesis of prostate specific membrane antigen (PSMA) ligands that are useful in the treatment of diseases like cancer. In particular, the disclosure relates to a method for synthesizing PSMA ligands having a glutamate-urea-lysine (GUL) moiety and a chelating agent that can comprise a radiometal