| abstract |
The purpose of the present invention is to provide: a method for producing a 7H-pyrrolo[2,3-d]pyrimidine derivative which is useful as a Janus kinase (JAK) inhibitory agent; an intermediate of the same; and a method for producing the intermediate. Provided is a method for producing 3-[(3S,4R)-3-methyl-6-(7H-pyrrolo[2,3-d]pyrimidine-4-yl)-1,6-Diazaspiro[3.4]octane-1-yl]-3-oxopropanenitrile using an organic acid of (3S,4R)-1-benzyl-3-methyl-1,6-Diazaspiro[3.4]octane and a salt thereof. |