公开(公告)号：US20200148697A1

公开(公告)日：2020-05-14

申请号：US16614400

申请日：2018-05-09

Applicant: BASF Agro B.V.

Inventor： Klaus DITRICH ,  Michael RACK ,  Stefan BENSON ,  Roland GOETZ ,  Helmut KRAUS

IPC: C07D493/08 ,  C07B57/00

Abstract: The present invention relates to a method for separating an optically active hydroxy cineole derivatives by lixiviation and crystallization and enantiomerically pure optically active hydroxy cineole derivatives of purity greater than 99.5% that have been prepared by this process. The present invention further relates to use of the desired enantiomer having enantiomeric excess of at least 99.5% ee as prepared according to the present invention, for the synthesis of enantiomerically pure 7-oxabicyclo[2.2.1]heptane derivatives.