Ethyl 2-cyano-4,4-diethoxybutyrate

It is specifically used to construct the pyrrolo[2, 3-d]pyrimidine core of the molecule, which is essential for the drug’s Janus kinase (JAK) inhibition activity. Ethyl 2-cyano-4,4-diethoxybutyrate is a key raw material or early-stage intermediate employed to synthesize Tofacitinib.

API Name Tofacitinib
CAS No 52133-67-2
Molecular Formula C11H19NO4
Molecular Weight 229.27 g/mol
Synonyms ethyl 2-cyano-4,4-diethoxybutanoate

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