Sphingomyelin Synthesis via Boc Protection and Stereoselective Reduction

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Current methods for synthesizing sphingomyelins, particularly those with fatty acids of 12 to 25 carbons, are not economically viable on a large scale, lacking effective synthetic pathways.

Innovation Solution

Development of novel synthetic approaches to produce enantiomerically pure sphingomyelins, including methods for synthesizing N-Palmitoyl-D-erythro-sphingosyl-phosphorylcholine and N-Palmitoyl-D-erythro-dihydrosphingosyl-phosphorylcholine, starting from D-erythro-sphingosine and D-erythro-dihydrosphingosine, using specific chemical reactions and reagents such as tert-butoxycarbonyl protection, stereoselective reduction, and phosphorylation steps.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conventional synthetic pathways are used for sphingomyelins, then synthesis can be performed, but large-scale production is not economically viable and lacks effective synthetic pathways

Engineering Contradiction:

Improvelarge-scale synthesis capabilityVSAvoideconomic viability

Core Design Contradiction:

ProductivityVSEase of manufacture

Solution Approach 1:

The synthesis is divided into modular stages: (1) protection of amino group with Boc, (2) formation of oxazolidine ring, (3) stereoselective reduction to establish D-erythro configuration, (4) deprotection to yield pure sphingosine. Each stage is optimized independently, enabling scalable production while maintaining economic viability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention changes key reaction parameters including using Boc protection instead of traditional protecting groups, employing specific catalysts for stereoselective reduction, and optimizing solvent systems. These parameter changes dramatically improve both productivity and economic feasibility of large-scale synthesis.

Inventive Principle:

Principle #35Parameter changes

2Manufacturing precision

If conventional methods are used, then synthesis can proceed, but enantiomeric purity is not achieved

Engineering Contradiction:

Improveenantiomeric purityVSAvoidsynthetic pathway complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The Boc protecting group is installed in advance on the amino group before any other transformations. This preliminary action prevents racemization during subsequent steps and establishes the foundation for high enantiomeric purity in the final product, simplifying the overall pathway to achieving D-erythro configuration.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The oxazolidine ring serves as a key intermediary structure that temporarily protects the molecular framework while enabling stereoselective reduction. This intermediary compound facilitates the establishment of D-erythro configuration with high purity, and its formation and decomposition steps are straightforward, reducing overall pathway complexity.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Adaptability or versatility

If existing synthetic pathways are used, then some sphingomyelins can be produced, but fatty acids with 12 to 25 carbons cannot be synthesized effectively

Engineering Contradiction:

Improvefatty acid chain length rangeVSAvoidsynthetic effectiveness

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The synthetic pathway uses universal reagents and conditions that work across the entire range of fatty acid chain lengths (12-25 carbons). The Boc protection strategy, oxazolidine formation, and stereoselective reduction protocol are all chain-length independent, making the method universally applicable to produce sphingomyelins with various fatty acid compositions including N-palmitoyl, N-stearoyl, and other variants.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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

Enables large-scale, cost-effective synthesis of sphingomyelins with high enantiomeric purity, addressing the limitations of existing synthetic pathways and providing a scalable solution for these compounds.

Implementation Method 1

protecting the amino group of an L-serine methyl ester or a salt thereof with a tert-butoxycarbonyl group

Methodology Applied

Scientific EffectProtecting group chemistry: Chemical Bonding

Implementation Method 2

reacting Boc-L-Ser-OMe with 2,2-dimethoxypropane in the presence of benzenesulfonic acid

Methodology Applied

Scientific EffectAcid catalysis: Catalysis

Implementation Method 3

stereo selectively reducing of the carbonyl group of (S)-3-(tert-butoxycarbonyl)-4-(1-oxo-hexadec-2-enyl)-2,2-dimethyloxazolidine with sodium borohydride and cerium trichloride

Methodology Applied

Scientific EffectStereoselective reduction: Reduction

Implementation Method 4

a method for synthesizing D-erythro-sphingosine starting from L-serine methyl ester comprising the steps

Methodology Applied

Scientific EffectChemical synthesis: Chemical Bonding

Data Source

PatentUS9708354B2Methods for the synthesis of sphingomyelins and dihydrosphingomyelins

Publication Date: 2017.07.18 CERENIS THERAPEUTICS HOLDINGS SA

AI summary

The present invention includes methods for the synthesis of sphingomyelins and dihydrosphingomyelins. The present invention also includes methods for the synthesis of sphingosines and dihydrosphingosines. The present invention further includes methods for the synthesis of ceramides and dihydroceramides.