175591-23-8Relevant articles and documents
PROCESS FOR THE PREPARATION OF TAPENTADOL AND ANALOGS THEREOF
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Page/Page column 6; 15-16, (2020/10/17)
The present invention relates to a process for the preparation of tapentadol and analogs or compounds or stereoisomers of formula (I), Formula I wherein, A is aryl, heteroaryl, and cycloalkyl; R is H, OH, OR1, halogen, C1-C12 alkyl, cycloalkyl, aryl or heteroaryl; R1 is C1-C12 alkyl, cycloalkyl, aryl or heteroaryl, wherein each of these groups may further be substituted with one or more substituent selected from H, OH, halogen, CN, NO2, C1-C4 alkyl or phenyl. Further, the multi-step process involves no column chromatography purification until the very last step. This makes this process highly commercially viable and industrially useful.
TWO-STEP PROCESS FOR PREPARING 3-SUBSTITUTED PHENYLALKYLAMINES
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, (2017/01/31)
Processes for preparing 3-substituted phenylalkylamines comprising reacting a phenyl boronic compound with an α-β unsaturated carbonyl-containing compound via an asymmetric 1,4-addition reaction, followed by reductive alkylation. The processes may be useful in the synthesis of tapentadol.
PROCESS FOR THE PREPARATION OF 3-[(1R,2R)-3-(DIMETHYLAMINO)-1-ETHYL-2-METHYLPROPYL]-PHENOL
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Page/Page column 91; 92, (2016/02/29)
A process for the preparation of a compound of formula (I) and of a acid salt (T) wherein R1 is selected from the group consisting of alkyl, aryl, cycloalkyl, heteroalkyl, heteroaryl and heterocycloalkyl, R2 and R3, are, independently of each other, selected from the group consisting of alkyl, aryl, cycloalkyl, heteroalkyl, heteroaryl and heterocycloalkyl, R4, R5, R6 and R7, are independently of each other, selected from the group consisting of H, alkyl, aryl, cycloalkyl, heteroalkyl, heteroaryl and heterocycloalkyl, and wherein the acid salt is a 2,3-Ditoluoyl tartaric acid salt, 2,3-Dibenzoyl tartaric acid salt, 2,3-Dianisoyl tartaric acid salt, 2,3-Dibenzoyl tartaric acid mono(dimethylamide) salt or a mixture of two or more thereof, wherein the tartaric acid salt (T) of the compound of formula (I) contains at least 90 % by weight of the tartaric salt of the compound of formula (Ia) based on the total weight of the acid salt of the compound of formula (I).