Simultaneous Enzymatic Synthesis of Green Notes
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Solution Overview
Problem
The demand for natural green notes, such as n-hexanal, n-hexanol, and (Z)-3-hexenol, exceeds their supply from traditional sources like mint oil, necessitating alternative methods for their production.
Innovation Solution
A method involving the contact of a hydroperoxide of a polyunsaturated fatty acid with a hydroperoxide lyase to form an aldehyde, which is then reduced in the presence of a hydride donor, a ketoreductase, and a co-factor to produce an alcohol, with the steps being carried out simultaneously.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional sources like mint oil are used to supply green notes, then the supply is limited and cannot meet demand, but alternative synthesis methods require multiple sequential steps that increase process complexity and time
Solution Approach 1:
The patent combines the hydroperoxide cleavage step (catalyzed by 13-HPL) and the aldehyde reduction step (catalyzed by alcohol dehydrogenase) into a single simultaneous reaction process. Both enzymatic reactions occur in the same reaction medium at the same time, eliminating the need for separate sequential steps and intermediate isolation, thereby reducing process complexity while increasing production capacity
2Productivity
If multiple sequential steps are used to produce green notes through enzymatic reactions, then manufacturing precision can be maintained, but the production time and process duration increase
Solution Approach 1:
The patent establishes a continuous simultaneous reaction system where 13-HPL continuously converts hydroperoxides to aldehydes while alcohol dehydrogenase continuously reduces aldehydes to alcohols in the same reaction medium. This continuous dual-action process eliminates idle time between steps and maintains constant productive action throughout the reaction period, significantly reducing overall process duration
3Quantity of substance
If fresh baker's yeast is added to reduce aldehydes to alcohols after hydroperoxide cleavage, then the desired alcohol products are formed, but the process requires separate addition steps and extended reaction time
Solution Approach 1:
The patent merges the aldehyde reduction function into the same reaction system where 13-HPL operates. Instead of adding fresh baker's yeast in a separate step after cleavage, the alcohol dehydrogenase enzyme is present from the beginning and acts simultaneously with 13-HPL on the aldehydes as they are formed, simplifying operational procedures while maintaining high alcohol product yields
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 method effectively produces high concentrations of (Z)-3-hexenol and other green notes, achieving yields that meet the demand for these compounds in the flavor and fragrance industry.
Implementation Method 1
contacting a hydroperoxide of a polyunsaturated fatty acid with a hydroperoxide lyase to form an aldehyde
Implementation Method 2
reducing the aldehyde in the presence of a hydride donor, a ketoreductase, and a co-factor to form an alcohol
Implementation Method 3
reducing the aldehyde in the presence of a hydride donor, a ketoreductase, and a co-factor to form an alcohol
Data Source
AI summary
The present invention relates to the production of aromatic hexanols and compositions containing them. In particular provided herein are methods of producing hexenols comprising: a) contacting a hydroperoxide of a polyunsaturated fatty acid with a modified hydroperoxide lyase to form a hexenal; and b) reducing the hexenal to a hexenol in the presence of a hydride donor, a ketoreductase, and a co-factor wherein the contacting and reducing steps are carried out at essentially the same time in the substantial absence of baker's yeast.