NAG-25 Synthesis Without Column Chromatography

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Solution Overview

Problem

Existing processes for preparing NAG-25, a carbohydrate targeting moiety, are inefficient, environmentally unfriendly, and result in high impurity levels, necessitating improved manufacturing methods that minimize chromatography steps and enhance purity and yield.

Innovation Solution

A process for preparing NAG-25 without column chromatography, utilizing crystalline forms of intermediates and specific reaction conditions to reduce impurities and improve isolation, including the use of coupling reagents, bases, and solvents to achieve high purity and yield.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If conventional processes are used to prepare NAG-25, then the manufacturing process is established, but the process is inefficient, environmentally unfriendly, and results in high impurity levels

Engineering Contradiction:

ImprovepurityVSAvoidefficiency

Core Design Contradiction:

Manufacturing precisionVSProductivity

Solution Approach 1:

The patent extracts and eliminates column chromatography steps from the conventional synthesis process. By removing this purification step, the process achieves high purity products (≥95% by HPLC) through optimized reaction conditions and intermediate isolation methods, thereby improving efficiency while maintaining manufacturing precision

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent employs parameter changes in reaction conditions (temperature, pH, solvent selection) and intermediate isolation parameters (crystallization conditions, filtration parameters) to achieve both high purity and efficient production. The optimized parameters enable one-pot syntheses and improved yield while minimizing impurities

Inventive Principle:

Principle #35Parameter changes

2Loss of substance

If conventional processes are used to prepare NAG-25, then the manufacturing process is established, but the process generates high waste and is environmentally unfriendly

Engineering Contradiction:

ImprovewasteVSAvoidenvironmental friendliness

Core Design Contradiction:

Loss of substanceVSEase of manufacture

Solution Approach 1:

The patent implements waste reduction by recovering and reusing solvents and reagents in the synthesis process. The optimized process minimizes waste generation through efficient reaction conditions and intermediate handling, thereby reducing environmental impact while maintaining ease of manufacture

Inventive Principle:

Principle #34Discarding and recovering

Solution Approach 2:

The patent converts potentially harmful byproducts and impurities into beneficial elements of the process. By optimizing reaction conditions, the process transforms what would be waste into usable intermediates or final product, reducing environmental harm while maintaining manufacturing feasibility

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Manufacturing precision

If conventional processes are used to prepare NAG-25, then the manufacturing process is established, but the process requires multiple chromatography steps which increases complexity

Engineering Contradiction:

ImprovepurityVSAvoidchromatography steps

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent removes column chromatography steps from the synthesis process, achieving high purity (≥95% by HPLC) through optimized reaction conditions and intermediate isolation. This extraction of the chromatography step reduces process complexity while maintaining manufacturing precision

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent replaces the mechanical chromatography system with chemical and physical methods for purification, such as crystallization, filtration, and optimized reaction conditions. This substitution achieves equivalent or superior purity with reduced process complexity

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 new process results in reduced impurities, increased yields, and decreased waste, providing a more efficient and environmentally friendly method for producing NAG-25 and its intermediates.

Implementation Method 1

reacting GluZ with GluOtBu or salt thereof to produce t-Butyl Core. In some embodiments, the reaction is performed in the presence of comprising a coupling reagent

Methodology Applied

Scientific EffectChemical Bonding: Chemical Bonding

Implementation Method 2

the base is N-methylmorpholine (NMM)

Methodology Applied

Scientific EffectBase catalysis:

Implementation Method 3

the solvent is MTBE. In some embodiments, the solvent is DCM. In some embodiments, the solvent is DMF

Methodology Applied

Scientific EffectSolvation: Solvation

Implementation Method 4

Additional new improved processes are further described herein. As a result of the process steps described, isolation of NAG-25 intermediates and yields have been improved, impurities have been reduced

Methodology Applied

Scientific EffectCrystallization: Crystallisation