专利检索 ap:("DSM IP ASSETS B.V.") AND inv:"Rolf KUENZI" 第 1 页

1.

发明公开
RING CLOSURE OF BENZOQUINONES CONTAINING AN UNSATURATED SIDE CHAIN USING A BASIC CATALYST 审中-公开

公开(公告)号：US20240217941A1

公开(公告)日：2024-07-04

申请号：US18557241

申请日：2022-04-26

申请人： DSM IP Assets B.V.

发明人： Werner BONRATH , Rolf KUENZI , Meltem TIRPANCI , Thomas NETSCHER

IPC分类号： C07D311/72 , C07D311/92

CPC分类号： C07D311/72 , C07D311/92

摘要： The present invention relates to the formation of compound of the formula (I) by a ring closure reaction of the compound of the formula (II) in the presence of a catalytic amounts of a base. It has been found that this reaction is very efficient and offers for example an efficient pathway for the synthesis of 3,4-dehydro-α-tocotrienol respectively α-tocotrienol and α-tocopherol.

2.

发明公开
COUPLING OF 2,3,5-TRIMETHYLHYDROQUINONE AND UNSATURATED ALCOHOLS 审中-公开

公开(公告)号：US20240209132A1

公开(公告)日：2024-06-27

申请号：US18556213

申请日：2022-04-26

申请人： DSM IP ASSETS B.V.

发明人： Werner BONRATH , Rolf KUENZI , Thomas NETSCHER

IPC分类号： C08F232/06 , C08F2/06 , C08F4/32 , C08F4/44

CPC分类号： C08F232/06 , C08F2/06 , C08F4/32 , C08F4/44

摘要： The present invention relates to the formation of compound of the formula (I) by reacting 2,3,6-trimethylhydroquinone or a protected derivative thereof with the unsaturated alcohol of formula (IIIa) or (IIIb) in the presence of Gd(OTf)3 or Tm(OTf)3 or Al(OTf)3 or Y(OTf)3 or Fe(OTf)2 or camphorsulfonic acid or BiCl3 as acidic catalyst.

3.

发明申请
IMPROVED SYNTHESIS OF AN EXPOXIDATION-CATALYST 有权

公开(公告)号：US20220024960A1

公开(公告)日：2022-01-27

申请号：US17414029

申请日：2019-12-17

申请人： DSM IP Assets B.V.

发明人： Werner BONRATH , Rolf KUENZI

IPC分类号： C07H3/02 , C07H1/00 , B01J31/02

摘要： The present invention relates to an improved process to produce a specific and very efficient epoxidation-catalyst (1,2:4,5-Di-O-isopropylidene-β-D-erythro-2,3-hexodiulo-2,6-pyranose).

4.

发明公开
RING CLOSURE OF BENZOQUINONES CONTAINING AN UNSATURATED SIDE CHAIN USING A BASE IN TWO-PHASE SYSTEM 审中-公开

公开(公告)号：US20240228454A1

公开(公告)日：2024-07-11

申请号：US18557648

申请日：2022-04-26

申请人： DSM IP ASSETS B.V.

发明人： Werner BONRATH , Rolf KUENZI

IPC分类号： C07D311/72 , C07D311/92

CPC分类号： C07D311/72 , C07D311/92

摘要： The present invention relates to the formation of compound of the formula (I) by a ring closure reaction of the compound of the formula (II) in the presence of a base in a two-phase system. It has been found that this reaction is very efficient and offers for example an efficient pathway for the synthesis of 3,4-dehydro-α-tocotrienol respectively a-tocotrienol and a-tocopherol.

5.

发明公开
VITAMIN K2 SYNTHESIS 审中-公开

公开(公告)号：US20230159429A1

公开(公告)日：2023-05-25

申请号：US17801681

申请日：2021-02-16

申请人： DSM IP Assets B.V.

发明人： Werner BONRATH , Rolf KUENZI

IPC分类号： C07C67/293

CPC分类号： C07C67/293

摘要： The present invention relates to a new process of production of menaquinone 4, which is also known as vitamin K2.