Enzymatic Stereoisomer Separation at Low Temperature for Enzyme Reuse
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing enzymatic processes for separating (1R,2S)-2,6-dimethyl-2,3-dihydro-1H-inden-1-amine suffer from enzyme degradation at high temperatures, limiting the number of separation cycles and increasing costs due to the use of expensive enzymes.
Innovation Solution
A process using Candida antarctica enzyme at lower temperatures (0-50°C) for acylation, followed by hydrogenation and reaction with a base or acid, allowing multiple cycles of isomer separation with enzyme reuse.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If enantioselective acylation is performed at high temperatures (70-130°C) as disclosed in prior art, then reaction rate is improved, but enzyme longevity deteriorates due to degradation
Solution Approach 1:
The patent changes the temperature parameter from high (70-130°C in prior art) to low (0-50°C in the invention) to resolve the contradiction. This parameter change maintains enzyme stability and longevity while still achieving effective reaction rates through optimized catalyst selection and reaction conditions.
2Manufacturing precision
If expensive enzymes are used for separation, then separation efficiency is improved, but cost increases and enzyme reuse becomes limited
Solution Approach 1:
The patent implements enzyme recovery and reuse through immobilization on solid supports. The immobilized enzyme can be filtered, washed, and reused for multiple cycles, transforming a single-use expensive reagent into a recoverable catalyst, thereby reducing costs while maintaining high separation efficiency.
3Productivity
If multiple separation cycles are performed, then productivity is improved, but enzyme degradation increases at high temperatures
Solution Approach 1:
The patent performs preliminary immobilization of the enzyme on a solid support before the separation cycles. This preliminary action protects the enzyme structure, enables easy recovery, and allows the same enzyme to be reused for multiple cycles without significant degradation, thereby increasing both productivity and reliability.
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
Achieves high purity (at least 95%) (1R,2S)-2,6-dimethyl-2,3-dihydro-1H-inden-1-amine with extended enzyme longevity, reducing costs by enabling multiple separation cycles.
Implementation Method 1
reaction of a mixture of the four isomers (1R,1R)-, (1S,2S)-, (1S,2R)- and (1R,2S)-2,6-dimethyl-2,3-dihydro-1H-inden-1-amine with an acylating agent, in the presence of an enzyme which is Candida antarctica
Implementation Method 2
step 3) is the hydrogenation with a metal catalyst of the mixture of the three isomers (1R,1R)-, (1S,2S)- and (15,2R)-2,6-dimethyl-2,3-dihydro-1H-inden-1-amine obtained in step 2)
Data Source
AI summary
An enzymatic process for the separation of isomers of 2,6-dimethyl-2,3-dihydro-1H-inden-1-amine.