Process
JP2025524140A5Pending Publication Date: 2026-07-28GIVAUDAN SA
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Patent Information
- Application Number
- JP2025504445
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2022-07-27
- Filing Date
- 2023-07-26
- Publication Date
- 2026-07-28
AI Technical Summary
Technical Problem
The limited supply of natural ambergris and the high cost of traditional chemical conversions necessitate a new, efficient synthetic route for producing amber ketal and its homologs.
Method used
A method involving the reaction of epoxides represented by formulas (III) and (IV) with an acyl halide in the presence or absence of a halide salt, avoiding the use of expensive homogeneous transition metal catalysts, to produce compounds like acetylmethyl farnesol and hydroxyfarnesyl acetone.
Benefits of technology
This method allows for selective production of amber ketal homologs with improved yield and ease of isolation, reducing reliance on costly and unsustainable catalysts while maintaining stereoisomer configurations.
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Abstract
Described herein is a method for making intermediates in the production of fragrance components starting from β-farnesene via a mixture comprising an epoxide represented by formula (III) as defined herein and an epoxide represented by formula (IV). In particular, methods for making acetylmethyl farnesol and hydroxyfarnesyl acetone and their homologues are described.
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