Novel pyran derivatives, their preparation and use thereof in perfumery
By reacting compounds III and IV in the presence of acid, new pyran derivatives are generated, which solves the challenge of developing new fragrance compounds in the fragrance industry, achieves stability and reduces the risk of allergies, and provides long-lasting fragrance Durability and good blending properties.
Patent Information
- Application Number
- CN201610286309.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2008-04-22
- Filing Date
- 2009-04-21
- Publication Date
- 2016-10-12
- Estimated Expiration
- 2029-04-21
AI Technical Summary
The fragrance industry faces challenges in the development of new fragrance-containing compounds, not least because of international regulatory requirements for certain materials and consumer demand for improved performance, existing compounds may pose allergic risks in long-term use and are difficult to mix well with other ingredients .
The method of reacting compounds III and IV in the presence of acid is carried out at 70°C to reflux temperature. A supported acid such as p-toluenesulfonic acid or H2SO4 is used as a catalyst to generate a new pyran derivative, and through esterification and dehydration and hydrogenation steps to optimize its structure and properties.
New pyran derivatives with good olfactory properties and stability have been successfully prepared, which can provide alternatives in the fragrance making process, reduce the risk of allergies, and can be used in cosmetics, food and other fields to provide long-term fragrance persistence and good blending properties.