The present invention provides a method for preparing the process intermediate 4-amino-5-methylpyridone of the formula (I), characterized in that the intermediate 4-hydroxy-5-methyl-1H-pyridin-2-one of the formula (III) is reacted with ammonia in an autoclave with addition of an ammonium bromide salt.
SYNTHESIS OF 4-AMINO-5-METHYL-1H-PYRIDIN-2(1H)-ON (INTERMEDIATE COMPOUND FOR THE SYNTHESIS OF THE MR ANTAGONIST FINERENONE) FROM 2-CHLORO-5-METHYL-4-NITRO-PYRIDINE-1-OXIDE USING THE INTERMEDIATE COMPOUND 2-CHLORO-5-METHYL-4-PYRIDINAMINE
申请人:Bayer Aktiengesellschaft
公开号:US20220153699A1
公开(公告)日:2022-05-19
The present invention relates to a novel and improved method for preparing 4-amino-5-methylpyridone of the formula (I)
which is an intermediate in the preparation of the MR antagonist finerenone.