[EN] AN IMPROVED PROCESS FOR THE PREPARATION OF (3R,4R)-(1-BENZYL-4-METHYLPIPERIDIN-3-YL)-METHYLAMINE<br/>[FR] PROCEDE AMELIORE POUR LA PREPARATION DE (3R,4R)-(1-BENZYL-4-METHYLPIPERIDIN-3YL)-METHYLAMINE
申请人:UNICHEM LAB LTD
公开号:WO2015087201A1
公开(公告)日:2015-06-18
The present invention is related to an improved and efficient process for preparation of (3R,4R)-(1-benzyl-4-methylpiperidin-3-yl)-methylamine which comprises: (a) N-acylation of 3-Amino-4-methyl pyridine; (b) Quarternization of 3-Acetylamino-4- methyl pyridine using benzyl halide; (c) Partial reduction of quarternized 3-Acetylamino- 4-methyl pyridine by Sodium borohydride in Methanol or water; (d) Hydrolysis of partially reduced product to 1-Benzyl-4-methylpiperidin-3-one in presence of acid; (e) Reductive animation of 1-Benzyl-4-methylpiperidin-3-one using Methanolic methylamine in presence of Titanium(IV) isopropoxide in Methanol; (f) Resolution of 1-Benzyl-4- methylpiperidin-3-yl)-methylamine using Ditoluoyl (L) tartaric acid to get (3R,4R)-(1- benzyl-4-methylpiperidin-3-yl)-methylamine. The invention is also related to novel intermediates.
PYRROLO[2,3-D]PYRIMIDINE DERIVATIVES: THEIR INTERMEDIATES AND SYNTHESIS
申请人:Gut Ruggeri Sally
公开号:US20120259115A1
公开(公告)日:2012-10-11
This invention relates to methods and intermediates useful for the synthesis of pyrrolo [2,3-d] pyrimidine compounds. Specifically novel synthetic methods and intermediates for the synthesis of 3-(3R,4R)-4-methyl-(7H-pyrrolo[2,3-d]pyrimidin-4-yl)-amino}-piperidin-1-yl)-3-oxo-propionitrile and its corresponding citrate salt are disclosed.
Pyrrolo[2,3-d]Pyrimidine Derivatives; Their Intermediates and Synthesis
申请人:Gut Ruggeri Sally
公开号:US20110288297A1
公开(公告)日:2011-11-24
This invention relates to methods and intermediates useful for the synthesis of pyrrolo[2,3-d]pyrimidine compounds. Specifically novel synthetic methods and intermediates for the synthesis of 3-(3R,4R)-4-methyl-(7H-pyrrolo[2,3-d]pyrimidin-4-yl)-amino}-piperidin-
1
-yl)-3-oxo-propionitrile and its corresponding citrate salt are disclosed.
The present invention relates to new piperidine inhibitors of Janus kinase 3 activity, pharmaceutical compositions thereof, and methods of use thereof.