- 专利标题: PROCESS FOR PREPARING 2-EXO-(2-METHYLBENZYLOXY)-1-METHYL-4-ISOPROPYL-7-OXABICYCLO[2.2.1]HEPTANE
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申请号: US16485563申请日: 2018-02-05
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公开(公告)号: US20200048275A1公开(公告)日: 2020-02-13
- 发明人: Stefan BENSON , Michael RACK , Roland GOETZ , Bernd WOLF , Joachim GEBHARDT , Helmut KRAUS
- 申请人: BASF Agro B.V.
- 优先权: EP17156302.6 20170215
- 国际申请: PCT/EP2018/052740 WO 20180205
- 主分类号: C07D493/08
- IPC分类号: C07D493/08
摘要:
This invention relates to a process for preparing (±)-2-exo-(2-Methylbenzyloxy)-1-methyl-4-iso-propyl-7-oxabicyclo[2.2.1]heptane of the formula (I), (I) any one of its individual enantiomers or any non-racemic mixture thereof comprising the steps of (a) deprotonating (±)-2-exo-hydroxy-1-methyl-4-isopropyl-7-oxabicyclo[2.2.1]heptane of the formula (II), (II) any one of its individual enantiomers or any non-racemic mixture thereof in the presence of at least one base of the formula [Mm+]n [An-]m (III) wherein Mm+ represents a m-valent metal cation wherein m is an integer of 1 or 2, and An_ represents a n-valent anion wherein n is an integer of 1 or 2, said base being capable of forming a solvent S1 selected from water, a C1-C4 alkyl alcohol or any combination thereof under the reaction conditions, to form a metal alkoxide or metal alkoxide solvate of the formula (IV), (IV) any one of its individual enantiomers or any non-racemic mixture thereof wherein Mm+, m and the solvent S1 have the same meaning as defined for the base of formula (III), and x denotes a number from 0 to 10, and (b) reacting the metal alkoxide or metal alkoxide solvate of the formula (IV), any of its individual enantiomers or any non-racemic mixture thereof with a 2-Methylbenzyl compound of the formula (V), (V) wherein X is a leaving group, wherein the steps (a) and (b) are conducted in the presence of at least one inert organic solvent S2 and comprise a further step of (c) simultaneously removing the solvent S1 from the reaction mixture.