Amgen Inc.

Sean H Wiedemann

Matthew Bio

Lawrence R McGee

Brian M Fox

Brian Stuart Lucas

Sebastien Caille

Yuanqing Fang

Filisaty Vounatsos

Brian McNeil Cochran

Sarah Wortman

Jacqueline E Milne

Eric Fang

Ash Wilsily

The present invention provides processes for making 2-((3R,5R,6S)-5-(3-chlorophenyl)-6-(4-chlorophenyl)-1-((S)-1-(isopropylsulfonyl)-3-methylbutan-2-yl)-3-methyl-2-oxopiperidin-3-yl)acetic acid as well as intermediates and processes for making the intermediates. Also provided are crystalline forms of the compound and the intermediates.

Processes of making and crystalline forms of a MDM2 inhibitor

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)&#x2014;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) 

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

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Cambridge, MA, United States of America

Sean H Wiedemann