Photo-oxygenation of carotenoids. I. The formation of dihydroactinidiolide and β-ionone from β-carotene
✍ Scribed by Sachihiko Isoe; Suong Be Hyeon; Takeo Sakan
- Book ID
- 104238860
- Publisher
- Elsevier Science
- Year
- 1969
- Tongue
- French
- Weight
- 145 KB
- Volume
- 10
- Category
- Article
- ISSN
- 0040-4039
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## Abstract A brief synthesis of damascenone (**5**) from the acetylenic diol **2** and also that of β‐damascone (**8**) from β‐ionol, resembling the biogenetic synthesis, are described. A possible mechanism for the formation of damascenone from neoxanthin is proposed.
New Cyclizing Agents in the Synthesis of β-Ionone from Pseudoionone. -The cyclization of pseudoionone (I) to β-ionone (III) is achieved in excellent selectivity using mixtures of trifluoroacetic acid with sulfuric or fluorosulfonic acid (5.5 : 1-1.25). Additionally, these mixtures can be used direc