2-(4-isobutyl-2-methylphenyl)propanal synthesis via regio-selective functionalization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing methods for replacing Lilial™, a perfume ingredient with toxic effects, rely on mixtures of known ingredients, which are costly and complex, and do not address the regulatory issues due to enzymatic degradation concerns, while a single compound replacement is needed for cost-effectiveness and simplicity in perfumery.
Innovation Solution
A novel compound with formula (I) is developed, which mimics Lilial™'s odor characteristics without enzymatic degradation to toxic benzoic acid derivatives, and an industrially scalable synthesis method is established using regio-selective functionalization of 3-methyl-1-isobutyl benzene as a key intermediate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If mixtures of known ingredients are used to replace Lilial™, then toxic effects are avoided, but cost increases and formulation complexity increases
Solution Approach 1:
The patent creates a single compound (2-(4-isobutyl-2-methylphenyl)propanal) that copies the desirable muguet odour characteristics of Lilial™ without copying its harmful metabolic pathway. By modifying the molecular structure slightly (changing tert-butyl to isobutyl group), the compound replicates the scent profile while avoiding enzymatic degradation to toxic benzoic acid derivatives, thus eliminating the need for complex mixtures to achieve both safety and performance.
Solution Approach 2:
The patent changes key molecular parameters of the perfume compound - specifically altering the alkyl substituent from tert-butyl to isobutyl group - to modify the metabolic behavior while preserving the olfactory properties. This parameter change prevents formation of toxic metabolites while maintaining the desired muguet character, solving both safety and simplicity requirements simultaneously.
2Object-affected harmful factors
If mixtures of known ingredients are used to replace Lilial™, then toxic effects are avoided, but manufacturing cost increases
Solution Approach 1:
Instead of using multiple expensive known ingredients in mixture to replace Lilial™, the patent develops a single novel compound that copies the desired performance characteristics. This approach reduces manufacturing cost by eliminating the need to source and blend multiple components, while also simplifying quality control and regulatory documentation.
Solution Approach 2:
The patent employs a straightforward synthetic route using readily available starting materials (3-methyl-1-isobutyl benzene) to produce the replacement compound. The synthesis uses common chemical reagents and standard organic chemistry transformations, making the process economically viable and industrially scalable without requiring expensive specialized materials or equipment.
3Device complexity
If a single compound replacement is used, then cost-effectiveness and simplicity are improved, but regulatory approval must be ensured by avoiding enzymatic degradation to toxic benzoic acid derivatives
Solution Approach 1:
The patent identifies the metabolic vulnerability of Lilial™ (enzymatic degradation to toxic t-BBA) and deliberately modifies the molecular structure to eliminate this harmful pathway. By changing the tert-butyl group to an isobutyl group, the compound becomes resistant to the same enzymatic degradation, converting a potential harm into a beneficial metabolic stability that ensures regulatory safety while maintaining formulation simplicity.
4Manufacturing precision
If regio-selective functionalization is used in synthesis, then manufacturing precision is improved, but process complexity increases
Solution Approach 1:
The patent employs 3-methyl-1-isobutyl benzene as a key intermediate compound that facilitates regio-selective functionalization. This intermediate structure with its specific substitution pattern directs subsequent chemical reactions to occur at the desired position on the aromatic ring, achieving high manufacturing precision while keeping the overall synthetic process manageable through well-established organic chemistry transformations.
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
The novel compound provides a cost-effective and simpler replacement for Lilial™, avoiding toxicity issues and enabling efficient industrial production through a scalable synthesis process, maintaining odor and performance characteristics similar to Lilial™.
Implementation Method 1
The regulatory issues surrounding Lilial™ are born from the fact that it is enzymatically degraded in rats and dogs to tert-butyl benzoic acid (t-BBA)
Implementation Method 2
an industrially scalable synthesis method is established using regio-selective functionalization of 3-methyl-1-isobutyl benzene as a key intermediate
Data Source
AI summary
The regio-selective functionalization of a dialkyl benzene compoundwherein the ratio of the compound functionalized at position (a) to the compound functionalized at the position (b) is at least 70:30, more particularly at least 80:20, still more particularly at least 85:15, and still more particularly at least 90:10, characterised in that the substituent R is an isobutyl group.