770-31-0

4-Amino-2-(methylthio)pyrimidine-5-carbaldehyde can be used for the preparation of pyridopyrimidines and naphthyridines as inhibitors of Akt kinase for the treatment of cancer.

Method A: Manganese dioxide (MnO2, 49.8 g, 572 mmol) was added to a chloroform (818 mL) suspension of 4-amino-2-(methylthio)pyrimidin-5-ylmethanol (28 g, 164 mmol), and the reaction mixture was stirred for 4 hours at 55°C (internal temperature). After completion of the reaction, the reaction mixture was filtered while hot and the filter cake was washed with hot chloroform and tetrahydrofuran (THF). The filtrates were combined, concentrated under reduced pressure and subsequently dried under vacuum to afford 4-amino-2-methylmercaptopyrimidine-5-carbaldehyde (26.7 g, 96% yield) as a light yellow solid. Mass spectrometry (MS) data: m/z 170.1 ([M+H]+).

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