SUBSTITUTED N-PENTANAMIDE COMPOUNDS, PREPARATION METHOD AND THE USE THEREOF
申请人:SHANGHAI INSTITUTE OF MATERIA MEDICA, CHINESE ACADEMY OF SCIENCES
公开号:US20160102047A1
公开(公告)日:2016-04-14
The present invention relates to a (2R,3R)-3-(3-substituted phenyl)-2-methyl n-pentanamide compounds as shown in the formula I and the preparation method thereof, wherein, the substituents are as defined in the specification, the present invention further relates to a use of the above compounds for the preparation of tapentadol II or its pharmaceutically acceptable salt, and the intermediates involved in the preparation process
METHOD FOR THE PREPARATION OF 1-ARYL-1-ALKYL-2-ALKYL-3-DIALKYLAMINOPROPANE COMPOUNDS
申请人:SIEGFRIED AG
公开号:US20150183727A1
公开(公告)日:2015-07-02
The present invention refers to the preparation of 1-aryl-1-alkyl-2-alkyl-3-dialkylamino-propane compounds, such as tapentadol, using a diastereoselective Eschenmoser-Claisen or Ireland-Claisen rearrangement.