IPA-Based Solid-Phase Peptide Synthesis With Lower PMI
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Solution Overview
Problem
Conventional solid-phase peptide synthesis (SPPS) methods are inefficient and environmentally unfriendly due to high process mass intensity (PMI) and the use of solvents like DMF and DCM, which are not environmentally friendly.
Innovation Solution
Isopropyl alcohol (IPA) is used as a major solvent or co-solvent in SPPS to replace DMF, facilitating resin swelling, deprotection, and washing steps, reducing the need for multiple washes and minimizing environmental impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional solvents (DMF, DCM) are used in SPPS, then peptide synthesis can be performed, but environmental friendliness deteriorates and PMI increases
Solution Approach 1:
The patent changes the solvent parameter from conventional DMF/DCM to IPA-based mixtures, fundamentally altering the chemical environment to achieve both environmental sustainability and acceptable PMI values through parameter substitution
Solution Approach 2:
The patent introduces IPA as an intermediary solvent that mediates between the reaction requirements and environmental constraints, enabling peptide synthesis while reducing harmful environmental factors and improving sustainability metrics
2Object-affected harmful factors
If DMF is replaced with a single solvent, then environmental friendliness improves, but resin swelling and solvent transfer performance deteriorates
Solution Approach 1:
The patent merges multiple solvents (IPA with DMSO, EtOAc, or NBP) into a binary mixture system, combining the environmental benefits of IPA with the functional properties of co-solvents to achieve both sustainability and reliable resin swelling
Solution Approach 2:
The patent creates composite solvent systems combining IPA with other solvents, where the composite nature of the mixture provides both environmental advantages and functional performance that single solvents cannot achieve alone
3Object-affected harmful factors
If NBP is used as alternative to DMF, then environmental friendliness improves, but viscosity increases affecting resin swelling and automation
Solution Approach 1:
The patent changes the viscosity parameter by using IPA instead of NBP, fundamentally altering the flow characteristics to maintain ease of operation in automated systems while preserving environmental benefits
Solution Approach 2:
The patent employs IPA, a readily available and easily disposable solvent, replacing more problematic solvents like NBP, achieving both environmental sustainability and operational simplicity through the use of a versatile, low-maintenance solvent
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
IPA-based SPPS offers a sustainable alternative with lower PMI, cost-effectiveness, and high-quality peptide synthesis, aligning with environmental sustainability goals and suitable for automated and large-scale peptide production.
Implementation Method 1
contacting the resin with a solvent comprising isopropyl alcohol (IPA) to swell the resin
Implementation Method 2
deprotecting the protected amino acid with a deprotection solution comprising IPA
Data Source
AI summary
Provided herein is an environmentally friendly method of solid-phase peptide synthesis (SPPS), wherein the method employs isopropyl alcohol (IPA) as the major solvent or co-solvent in the synthesis steps of deprotection, washing, and coupling. The presently disclosed methods employ IPA in place of traditional solvents such as N,N-dimethylformamide (DMF) and dichloromethane (DCM).