Process for the preparation of intermediates for the synthesis of vitamin A derivatives from polyenes by cyclisation
US11958797B2 · kind B2 · utility
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14Claims
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Key dates
| Filing date | Apr 3, 2020 |
| Grant date | Apr 16, 2024 |
| Priority date | — |
| Expiry date | Feb 27, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2601/16
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The application relates to a process for the preparation of a compound of formula (II) by cyclisation of a polyene of formula (I), and to an intermediate of formula (III). The obtained compounds are useful intermediates in the preparation of specific isoprenoids, preferably in the production of vitamin A and derivatives of vitamin A.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.