Alpha-Galactosyl Ceramide Synthesis via Lewis Acid Catalysis

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

The existing methods for preparing α-galactosyl ceramides are hindered by the use of toxic, hazardous, and expensive reagents, and require numerous purification steps, making them unsuitable for industrial scale-up.

Innovation Solution

A method involving glycosylation of a sugar derivative with a ceramide acceptor in the presence of a Lewis acid, using a leaving group such as an acetimidate, and subsequent deprotection and coupling with a fatty acid chloride, reducing the number of purification steps and eliminating the need for hazardous reagents.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the existing method using fluoro-sugar derivative and phytosphingosine moiety is used, then α-GC compounds can be prepared, but toxic, hazardous and expensive reagents are required

Engineering Contradiction:

Improvepreparation of α-GC compoundsVSAvoidtoxic, hazardous and expensive reagents

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent replaces expensive and hazardous reagents (AgClO4, SnCl2, PPh3, DIAD, DAST, hydrofluoric acid, DCC, sodium) with cheaper, safer, and more environmentally friendly alternatives. The new methodology uses readily available reagents that are less toxic and more cost-effective, making the process suitable for industrial scale-up while maintaining product quality.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The patent transforms the harmful aspects of the original method into benefits by eliminating toxic reagents and reducing environmental hazards. The new approach converts a hazardous multi-step process into a safer, more sustainable methodology that maintains effectiveness while removing harmful elements, thereby turning the original problem into an advantage.

Inventive Principle:

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

2Reliability

If the existing method is used, then α-GC compounds can be prepared, but at least 11 steps of purification by silica-gel column chromatography are necessary

Engineering Contradiction:

Improvepreparation of α-GC compoundsVSAvoidnumber of purification steps

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent segments the complex 11-step purification process into fewer, more efficient purification steps. By redesigning the synthetic pathway and selecting appropriate protecting groups and reaction conditions, the method reduces the number of silica-gel column chromatography steps from 11 to a manageable number, thereby simplifying the overall process while maintaining product purity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies preliminary protective group strategies and reaction condition optimizations that prevent the formation of difficult-to-remove impurities. By planning the synthesis route with purification in mind from the outset, the method anticipates and avoids the need for numerous chromatography steps, making the process more efficient and scalable.

Inventive Principle:

Principle #10Preliminary action

3Reliability

If the existing method is used, then α-GC compounds can be prepared, but the method is difficult to implement at industrial scale

Engineering Contradiction:

Improvepreparation of α-GC compoundsVSAvoidindustrial scale-up

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent employs inexpensive, readily available reagents and catalysts that are suitable for large-scale production. By replacing expensive, sensitive, or hazardous materials with robust, cost-effective alternatives, the method becomes more amenable to industrial manufacturing while maintaining product quality and yield.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The patent optimizes reaction parameters such as temperature, solvent choice, catalyst loading, and reaction time to improve scalability. By adjusting these parameters, the method achieves better yields, faster reaction times, and easier workup procedures that are suitable for industrial implementation while maintaining the reliability of α-GC compound preparation.

Inventive Principle:

Principle #35Parameter changes

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

This approach simplifies the synthesis of α-galactosyl ceramides, reducing the number of purification steps and eliminating the use of toxic reagents, making the process more efficient and scalable.

Implementation Method 1

The present invention relates to a method of preparation of a compound of formula (I)... comprising a step a) of glycosylation, preferably in the presence of a Lewis acid

Methodology Applied

Scientific EffectLewis acid catalysis: Catalysis

Data Source

PatentUS10870671B2Method of preparation of alpha galactosyl ceramides compounds

Publication Date: 2020.12.22 ABIVAX

AI summary

The present invention relates to a method of preparation of α-galactosyl ceramides compounds of formula (I):comprising a step a) of glycosylation of a compound of formula (II):with a compound of formula (III):