Method for the preparation of [1,2,4]-triazolo[4,3-a]pyridines

    公开(公告)号:US09643984B2

    公开(公告)日:2017-05-09

    申请号:US14900976

    申请日:2014-06-24

    Applicant: AMGEN, INC.

    CPC classification number: C07D519/00 C07D471/04

    Abstract: Disclosed herein are methods for preparing [1,2,4]triazolo[4,3-a]pyridines, particularly (R)-6-(1-(8-fluoro-6-(1-methyl-1H-pyrazol-4-yl)-[1,2,4]triazolo[4,3-a]pyridin-3-yl)ethyl)-3-(2-methoxyethoxy)-1,6-naphthyridin-5(6H)-one, and precursors thereof, such as a method comprising reacting (R)—N-(3-fluoro-5-(1methyl-1H-pyrazol-4-yl) pyridin-2-yl)-2-(3-(2-methoxyethoxy)-5-oxo-1,6-naphthyridin-6(5H)yl) propanehydrazide (“HYDZ”): (HYDZ) under conditions sufficient to form (R)-6-(1-(8-fluoro-6-(1-methyl-IH-pyrazol-4-yl)-[1,2,4]triazolo[4,3-a]pyridin-3-yl)ethyl)-3-(2-methoxyethoxy)-1,6-naphthyridin-5(6H)-one (“A”): (A)

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