Potassium Carbonate → 6-Hydroxy-5-oxo-1-(2-oxo-2-piperidin-1-yl-ethyl)-1,5-dihydro-imidazo[1,2-a]pyrimidine-7-carboxylic acid methyl ester

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Reaction Steps

To a solution of the product of example 1 (3.6 g, 9.57 mmol) in MeOH (40 ml) was added K2CO3 (2.7 g, 19.5 mol). The mixture was stirred at room temperature for about 1 hour and then filtered. The filtrate was concentrated into dryness to give the titled product (crude yield 100%) as yellow solid, which was used directly in next step.

Provenance & Evidence