Benzylsulfonyl Dipeptide Synthesis via Solvent Optimization
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Solution Overview
Problem
The existing processes for manufacturing benzylsulfonyl-Ser-X-4-amidinobenzylamide compounds result in low yields and high production costs due to poor solubility and the need for inconvenient ionic exchange chromatographic steps, making them unsuitable for industrial-scale production.
Innovation Solution
A process involving the coupling of benzylsulfonyl-Ser (tBu)-OH with X-4-amidinobenzylamide, followed by conversion of the nitrile function, removal of the tert-butyl ether protecting group, and reduction of the hydroxyl amidine function, using specific solvents and catalysts to achieve high yield and purity with fewer steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If existing processes are used to manufacture benzylsulfonyl-Ser-X-4-amidinobenzylamide, then the product can be obtained, but the yield is very limited due to poor solubility
Solution Approach 1:
The patent changes the physical-chemical parameters of the reaction system by selecting specific solvents (DMF, DMSO, NMP, or their mixtures with water or alcohols) that improve the solubility of the poorly soluble benzylsulfonyl dipeptide derivatives. This parameter change enables the reaction to proceed with much higher yields (70-95%) compared to existing processes.
2Manufacturing precision
If ionic exchange chromatographic step is included in the process, then product purification can be achieved, but the process becomes inconvenient for industrial scale production
Solution Approach 1:
The patent extracts and eliminates the problematic ionic exchange chromatographic step from the manufacturing process. Instead, it employs simpler purification methods such as filtration and crystallization that are much more convenient for industrial scale production while still achieving the required product purity.
Solution Approach 2:
The patent replaces expensive and complex chromatographic materials with simpler, more economical purification approaches using common solvents and standard filtration/crystallization techniques, making the process economically viable for large-scale production.
3Manufacturing precision
If existing processes are used, then product can be manufactured, but the number of steps is high and manufacturing cost is increased
Solution Approach 1:
The patent merges multiple separate steps into a more integrated process flow. By improving solubility in the reaction medium, it enables better reaction progress and simplifies downstream processing, effectively combining purification steps and reducing the overall number of operations required.
Solution Approach 2:
The patent performs preliminary optimization of the reaction conditions, particularly solvent selection, to ensure high solubility and reaction efficiency from the outset. This preliminary action prevents the need for multiple corrective or additional steps later in the process.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The process achieves a high yield and purity of benzylsulfonyl-Ser-X-4-amidinobenzylamide with minimal side products and reduced manufacturing costs, making it suitable for industrial production.
Implementation Method 1
reducing the hydroxyl amidine or protected hydroxy amidine function to the amidine
Implementation Method 2
using specific solvents and catalysts to achieve high yield and purity
Data Source
AI summary
The present invention is related to a novel and improved process for the manufacture of compounds of formula (I) or salts thereof herein designated as benzylsulfonyl-Ser-X-4-amidinobenzylamide, wherein R is a C1 to C6 linear or branched aliphatic hydrocarbon chain optionally substituted with a C6 to C10 aromatic group.