Reagent for Organic Synthesis with Phase-Change Separation
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Solution Overview
Problem
Existing methods for organic synthesis, such as those using chemically modified reagents on polystyrene or silica, face challenges with low reactivity and high costs due to the need for expensive fluorous solvents and complex separation processes, particularly in multistage synthesis reactions.
Innovation Solution
A reagent with an aromatic group and a hydrophobic docosyloxy group that reversibly changes from a liquid to a solid phase with changes in solution composition or temperature, allowing for easy separation of unnecessary compounds and byproducts, and can function as a nucleophilic or electrophilic scavenger, reaction accelerator, or synthesis building block.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If chemically modified reagents on polystyrene or silica are used, then separation of unreacted compounds and byproducts becomes easy, but reactivity decreases due to solid-liquid interface limitation
Solution Approach 1:
The invention changes the physical state parameter of the reagent from solid (on polystyrene/silica) to liquid phase, enabling homogeneous reaction while maintaining easy separation through controlled solidification after reaction
Solution Approach 2:
The reagent dynamically transitions between liquid phase (during reaction for high reactivity) and solid phase (after reaction for easy separation), optimizing both reactivity and ease of operation at different stages
2Ease of operation
If fluorous solvents and fluorous tags are used for separation, then separation efficiency improves, but process cost increases significantly
Solution Approach 1:
The invention replaces expensive fluorous solvents and tags with a cheap reagent design that uses ordinary solvents and achieves separation through controlled solidification, eliminating the need for costly specialized materials
Solution Approach 2:
The invention changes the separation mechanism from relying on fluorous tag solubility properties to relying on controlled solidification through temperature or composition changes, using ordinary solvents instead of expensive fluorous solvents
3Ease of operation
If chemically modified reagents on solid supports are used, then separation becomes simple, but process development time and expense increase due to trial and error
Solution Approach 1:
The invention uses a reagent with built-in controlled solidification properties that work with ordinary solvents, eliminating the need for extensive trial-and-error optimization of solidification conditions that plagues solid support reagents
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 organic synthesis reactions to be conducted in a liquid phase with high reactivity and low cost, simplifying the separation of products and reducing process development time and expense, particularly in pharmaceutical research and development.
Implementation Method 1
a reagent for organic synthesis which is a compound which rapidly changes from a liquid phase state to a solid phase state due to a change in solution composition and/or solution temperature
Data Source
AI summary
A reagent for organic synthesis with which a chemical reaction can be conducted in a liquid phase and unnecessary compound(s) can be easily separated at low cost from the liquid phase after completion of the reaction. The reagent for organic synthesis reversibly changes from a liquid-phase state to a solid-phase state with changes in solution composition and/or solution temperature, and is for use in organic synthesis reactions. This reagent for organic syntheses facilitates process development. With the reagent, research on and development of, e.g., medicines through, e.g., compound library synthesis, etc. can be accelerated. It can hence contribute to technical innovations in the biochemical industry and chemical industry.