**The Synthesis of 2,2′‐Dinor‐carotenoids.** 2,2′‐Dinor‐carotenoids which include the naturally occurring actinioerythrol (**1**) and the blue carotenoid violerythrin (**2**) have been obtained by total synthesis. The synthesis starts with acetone and acetylene and yields compounds **1** and **2**
Die Synthese von Actinioerythrol, Violerythrin und anderen 2,2′-Dinor-carotinoiden
✍ Scribed by Frank Kienzle; Rudolf E. Minder
- Publisher
- John Wiley and Sons
- Year
- 1978
- Tongue
- German
- Weight
- 488 KB
- Volume
- 61
- Category
- Article
- ISSN
- 0018-019X
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✦ Synopsis
The Synthesis of Actinioerythrol, Violerythrin and other 2,2′‐Dinor‐carotenoids
2,2′‐Dinor‐carotenoids including the naturally occurring actinioerythrol (1) and the blue carotenoid violerythrin (2), as well as 2,2′‐dinor‐rhodoxanthin (25) and 2,2′‐dinor‐zeaxanthin (27) and others have been obtained by total synthesis.
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**Synthesis of nor‐β‐cyclocitral, norsafranal, and 2, 2′‐dinor‐β‐carotene** The synthesis of 2, 2′‐dinor‐β‐carotene (**10**) __via__ norsafranal (**5**) and nor‐β‐cyclocitral (**6**) is described.
## Abstract Der Weg einer Khellin‐Synthese wird mitgeteilt, bei welcher das bisher unbekannte 4.7‐Dimethoxy‐6‐hydroxy‐cumaron mit β‐Chlor‐crotonsäure‐methylester veräthert und die Säure des erhaltenen Äthers zum Khellin ringgeschlossen wird.