Ethyl Acetoacetate → Ethyl 4-(2-chloro-4-fluorophenyl)-6-methyl-2-(pyrazin-2-yl)-1,4-dihydropyrimidine-5-carboxylate

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Reaction Steps

Pyrazine-2-carboximidamide hydrochloride (5 g, 31.5 mmol) was reacted with 2-chloro-4-fluorobenzaldehyde (5 g, 31.5 mmol) and ethyl 3-oxobutanoate (4.1 g, 31.5 mmol) according to the procedure as described in Example 1, Step A to give the title compound as a yellow solid (4.84 g, 41%). The compound was characterized by the following spectroscopic data:

Provenance & Evidence