1615709-89-1Relevant articles and documents
Synthesis method for preparing intermediates of tofacitinib
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, (2018/11/04)
The invention provides a novel method for synthesizing primary ring cis-4-methyl-3-methylamino-1-benzylpiperidine bis-hydrochloride of tofacitinib. The primary ring cis-4-methyl-3-methylamino-1-benzylpiperidine bis-hydrochloride is made from 3-halogenation-picoline. The novel method includes steps of catalytic Ullman coupling, 3-halogenation-picoline and benzyl halide salifying, hydroboration reagent reduction, salifying and the like to obtain target compounds. The method has the advantages of simple conditions, easily available reagents and operational safety.
A synthetic cis - 1 - benzyl - 3 - methylamino - 4 - methyl - piperidine
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Paragraph 0036; 0037, (2017/08/25)
The invention relates to a method for synthesizing cis-1-benzyl-3-methylamino-4-methyl-piperidine, in particular to a method for synthesizing cis-1-benzyl-3-methylamino-4-methyl-piperidine by taking 1-benzyl-3-methylamino-4-methyl-piperidine bromide as an