| 发明名称 |
PROCESS FOR THE PRODUCTION OF 1,3,3-TRIMETHYL-2-(3-METHYLPENT-2-EN-4-YNYL)CYCLOHEX-1-ENE |
| 摘要 |
The present invention relates to an improved process for the production of 1,3,3-trimethyl-2-(3-methylpent-2-en-4-ynyl)cyclohex-1-ene, highly enriched in the Z-isomer, and the use of such compounds in organic syntheses, especially in processes forming intermediates (building blocks) the synthesis of vitamin A or β-carotene or other carotenoids, e.g. canthaxanthin, astaxanthin or zeaxanthin. |
| 申请公布号 |
US2014323767(A1) |
申请公布日期 |
2014.10.30 |
| 申请号 |
US201214128741 |
申请日期 |
2012.06.14 |
| 申请人 |
Bonrath Werner;Netscher Thomas;Schütz Jan;Wüstenberg Bettina |
发明人 |
Bonrath Werner;Netscher Thomas;Schütz Jan;Wüstenberg Bettina |
| 分类号 |
C07C403/02;C07C403/24;C07C403/08 |
主分类号 |
C07C403/02 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A process of production of 1,3,3-trimethyl-2-(3-methylpent-2-en-4-ynyl)cyclohex-1-ene (compound of formula (I))by dehydration of 3-methyl-5-(2,6,6-trimethylcyclohex-1-enyl)pent-1-yn-3-ol(compound of formula (II)), characterised in that at least one thiolate-bridged diruthenium complex is used as catalyst. |
| 地址 |
Basel CH |
