106157-82-8

Using 4-(1,1-dimethoxyethyl)pyrimidin-2-amine (17.5 g, 95.5 mmol) as starting material, it was dissolved in formic acid and the reaction was stirred for 6 hours at room temperature. After completion of the reaction, the reaction solution was concentrated to dryness. The resulting residue was dissolved in ethanol (50 mL), stirred and filtered to obtain 1-(2-aminopyrimidin-4-yl)ethanone (9.2 g, 70% yield).

[1] Journal of Heterocyclic Chemistry, 1985, vol. 22, p. 1723 - 1726
[2] Patent: US2007/142415, 2007, A1. Location in patent: Page/Page column 17
[3] Patent: WO2005/14572, 2005, A1. Location in patent: Page/Page column 24; 25
[4] Patent: US2007/142414, 2007, A1. Location in patent: Page/Page column 19
[5] Patent: WO2007/96334, 2007, A1. Location in patent: Page/Page column 32-33