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公开(公告)号：US20230034961A1
公开(公告)日：2023-02-02
申请号：US17785828
申请日：2020-12-14
Applicant: BASF SE
Inventor： Alexander Michael HAYDL , Michael SCHMITT , Klaus BECKER , Dirk BETHKE , Elena CAPITO' , Johann-Peter MELDER
IPC: C07D403/14
Abstract: The present invention relates to process for the preparation of a compound of formula (1), wherein R1 and R2 are independently from each other C1-C8alkyl, which comprises reacting a compound of formula (2), with a formaldehyde source in presence of a palladium or platinum catalyst at a hydrogen pressure of 5×108 mPa to 200×108 mPa.
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