Invention Grant
- Patent Title: Process for the preparation of intermediates for the synthesis of vitamin A derivatives from polyenes by cyclisation
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Application No.: US17603177Application Date: 2020-04-03
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Publication No.: US11958797B2Publication Date: 2024-04-16
- Inventor: Fabrice Aquino , Werner Bonrath , Marc-André Mueller , Bettina Wuestenberg
- Applicant: DSM IP ASSETS B.V.
- Applicant Address: NL Heerlen
- Assignee: DSM IP ASSETS B.V.
- Current Assignee: DSM IP ASSETS B.V.
- Current Assignee Address: NL Heerlen
- Agency: NIXON & VANDERHYE P.C.
- Priority: EP 169204 2019.04.15
- International Application: PCT/EP2020/059481 2020.04.03
- International Announcement: WO2020/212165A 2020.10.22
- Date entered country: 2021-10-12
- Main IPC: C07C49/21
- IPC: C07C49/21 ; C07C45/67
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.
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