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公开(公告)号：US20220194897A1
公开(公告)日：2022-06-23
申请号：US17603122
申请日：2020-04-03
Applicant: DSM IP ASSETS B.V.
Inventor： Werner BONRATH , Marc-André MUELLER , Bettina WUESTENBERG , Florian ZIEGLER
IPC: C07C403/12
Abstract: The present invention relates to new specific enol esters of formula (I) as well as to a process for their production. In formula (I) R is COR′ where R′ is a C1-C16 alkyl group.
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公开(公告)号：US20210276935A1
公开(公告)日：2021-09-09
申请号：US17331328
申请日：2021-05-26
Applicant: DSM IP ASSETS B.V.
Inventor： Werner BONRATH , Jan SCHUETZ , Thomas NETSCHER , Bettina WUESTENBERG
IPC: C07C29/38 , C07C403/08 , C07C29/42
Abstract: The present invention relates to a catalytic process for the ethynylation of specific polyunsaturated aldehydes and ketones.
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公开(公告)号：US20230142429A1
公开(公告)日：2023-05-11
申请号：US17915448
申请日：2021-03-22
Applicant: DSM IP ASSETS B.V.
Inventor： Werner BONRATH , Marc-André MUELLER , Bettina WUESTENBERG , Viktor ZIMMERMANN
IPC: C07D333/48
CPC classification number: C07D333/48
Abstract: The present invention relates to a new process for the production of new specific intermediates, which are preferably used in the production of vitamin A, vitamin A acetate, or β-carotene and derivatives thereof, e.g. canthaxanthin, astaxanthin or zeaxanthin.
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公开(公告)号：US20220204434A1
公开(公告)日：2022-06-30
申请号：US17603177
申请日：2020-04-03
Applicant: DSM IP ASSETS B.V.
Inventor： Fabrice AQUINO , Werner BONRATH , Marc-André MUELLER , Bettina WUESTENBERG
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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公开(公告)号：US20170313655A1
公开(公告)日：2017-11-02
申请号：US15518383
申请日：2015-10-15
Applicant: DSM IP ASSETS B.V.
Inventor： Werner BONRATH , Jan SCHUETZ , Thomas NETSCHER , Bettina WUESTENBERG
IPC: C07C403/14
CPC classification number: C07C403/14 , C07C29/42 , C07C45/512 , C07C2601/16 , C07C33/14 , C07C47/225
Abstract: The present invention relates to an improved method for producing specific α,β-unsaturated aldehydes.
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Patent Agency Ranking
公开(公告)号：US20170297984A1
公开(公告)日：2017-10-19
申请号：US15518080
申请日：2015-10-15
Applicant: DSM IP ASSETS B.V.
Inventor： Werner BONRATH , Jan SCHUETZ , Thomas NETSCHER , Bettina WUESTENBERG
IPC: C07C29/38 , C07C2601/16
CPC classification number: C07C29/38 , C07C29/42 , C07C403/08 , C07C2601/16 , C07C33/048
Abstract: The present invention relates to a catalytic process for the ethynylation of specific poly-unsaturated aldehydes and ketones.
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公开(公告)号：US20230125156A1
公开(公告)日：2023-04-27
申请号：US17915453
申请日：2021-03-22
Applicant: DSM IP ASSETS B.V.
Inventor： Werner BONRATH , Marc-André MUELLER , Bettina WUESTENBERG , Viktor ZIMMERMANN
Abstract: The present invention relates to a new process for the production of vitamin A and/or its derivatives.
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公开(公告)号：US20230090098A1
公开(公告)日：2023-03-23
申请号：US17787806
申请日：2020-12-15
Applicant: DSM IP Assets B.V.
Inventor： Werner BONRATH , Marc-André MUELLER , Bettina WUESTENBERG
IPC: C07F7/18
Abstract: The present invention relates to the functionalisation of specific 1,3-alpha-dienes. These functionalized 1,3-alpha-dienes are important intermediates in organic synthe-sis (especially in the synthesis of carotenoids, vitamin A and/or vitamin A derivatives).
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公开(公告)号：US20220220071A1
公开(公告)日：2022-07-14
申请号：US17603488
申请日：2020-04-03
Applicant: DSM IP ASSETS B.V.
Inventor： Werner BONRATH , Marc-André MUELLER , Bettina WUESTENBERG , Florian ZIEGLER
IPC: C07C403/12
Abstract: The present invention relates to new specific enol esters of formula (I) as well as to a process for their production by acylation of the corresponding dihydroretinal analogue. In formula (I) R is —COR′ where R′ is a C1-C16 alkyl group.
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公开(公告)号：US20250034087A1
公开(公告)日：2025-01-30
申请号：US18712069
申请日：2022-11-23
Applicant: DSM IP ASSETS B.V.
Inventor： Werner BONRATH , Jonathan Alan MEDLOCK , Marc-André MUELLER , Marcel STETTLER , Bettina WUESTENBERG , Viktor ZIMMERMANN
IPC: C07C403/20 , C07D333/48
Abstract: The present invention relates to a new process for the production of vitamin A and/or its derivatives.
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