FDM Ether Synthesis via Polar Aprotic Solvent and Base

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Solution Overview

Problem

The high cost and limited availability of furan-2,5-dimethanol (FDM) and 2,5-bis(hydroxymethyl)tetrahydrofuran (bHMTHF) derivatives hinder their utilization as renewable alternatives for petroleum-based chemicals, despite their potential in polymer synthesis, pharmaceuticals, and other industrial applications, due to their expensive production from agricultural raw materials.

Innovation Solution

A process involving the synthesis of linear mono- and di-alkyl ethers of FDM and bHMTHF using a polar aprotic organic solvent and a Brønsted base with a specific pKa, allowing for the production of compounds like (5-((octadecyloxy)methyl)furan-2-yl)methanol and (2S,5S)-2,5-bis((octadecyloxy)methyl)tetrahydrofuran, which are valuable as bio-based surfactants and plasticizers.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If FDM and bHMTHF derivatives are produced from agricultural raw materials using conventional methods, then renewable alternative chemicals are obtained, but the production cost is extremely high (approximately $200 per gram)

Engineering Contradiction:

Improverenewable alternative capabilityVSAvoidproduction cost

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The patent changes the reaction parameters by using a polar aprotic solvent with high permittivity (ε > 8) and a Brønsted base with specific pKa characteristics (ΔpKa ≥ 15), which fundamentally alters the reaction efficiency and cost structure. This parameter change enables the same renewable chemical transformation to proceed at commercially viable costs while maintaining the renewable alternative capability.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent introduces a polar aprotic solvent as an intermediary medium that facilitates the reaction between the Brønsted base and the starting materials. This intermediary solvent with high permittivity creates a favorable reaction environment that dramatically improves efficiency and reduces costs, making the renewable chemical production economically feasible.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Quantity of substance

If FDM and bHMTHF derivatives are produced using standard synthesis routes, then the compounds are obtained, but the process complexity and cost prevent commercial competitiveness with petroleum products

Engineering Contradiction:

Improvecompound availabilityVSAvoidprocess complexity

Core Design Contradiction:

Quantity of substanceVSDevice complexity

Solution Approach 1:

By changing the solvent permittivity parameter to ε > 8 and selecting bases with specific pKa differences, the patent simplifies the synthesis process while increasing compound availability. These parameter changes lead to more efficient reactions with fewer side products and simpler workup procedures, reducing overall process complexity.

Inventive Principle:

Principle #35Parameter changes

3Productivity

If the permittivity of the polar aprotic solvent is increased (ε > 8), then the synthesis efficiency and productivity improve, but the solvent selection range is limited

Engineering Contradiction:

Improvesynthesis efficiencyVSAvoidsolvent selection flexibility

Core Design Contradiction:

ProductivityVSAdaptability or versatility

Solution Approach 1:

The patent establishes a specific parameter threshold (permittivity ε > 8) that optimizes synthesis efficiency. While this narrows the solvent selection range, it provides clear guidance for selecting from a defined class of solvents (such as acetonitrile, dimethylformamide, dimethyl sulfoxide) that all meet the efficiency requirement, trading broad flexibility for optimized performance.

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 process reduces the cost and complexity of producing FDM and bHMTHF derivatives, making them more economically viable for industrial use and enabling their application in surfactants, dispersants, and other chemical applications.

Implementation Method 1

contacting either FDM or bHMTHF in a polar aprotic organic solvent having a permittivity (∈)>8

Methodology Applied

Scientific EffectSolvation: Solvation

Implementation Method 2

polar aprotic organic solvent having a permittivity (∈)>8

Methodology Applied

Scientific EffectDielectric permittivity: Dielectric Permittivity

Implementation Method 3

contacting either FDM or bHMTHF in a polar aprotic organic solvent having a permittivity (∈)>8, at a temperature ranging from about −25° C. to about 100° C., with either a) an unhindered Brønsted base having a difference in pKa (ΔpKa)≧15 relative to the pKa of a hydroxyl group

Methodology Applied

Scientific EffectAcid-base reaction:

Implementation Method 4

Methodology Applied

Scientific EffectNucleophilic substitution:

Data Source

PatentUS9670174B2Mono- and dialkyl ethers of furan-2,5-dimethanol and (tetra-hydrofuran-2,5-diyl)dimethanol and amphiphilic derivatives thereof

Publication Date: 2017.06.06 ARCHER DANIELS MIDLAND CO

AI summary

Linear mono- and dialkyl ethers of furan-2,5-dimethanol (FDM) and/or 2,5-bis(hydroxymethyl)tetrahydrofuran (bH-MTHF), methods for their preparation, and derivative chemical compounds thereof are described. In general, the synthesis process entails a reaction of FDM or bHMTHFs in a polar aprotic organic solvent having a permittivity ( )>8, at a temperature ranging from about −25 C to about 100 C, with either a) an unhindered Brnsted base with a pKa?15 or b) a hindered Brnsted base having minimum pKa of about 16, and a nucleophile.