Triethylamine → 2-chloro-4-[4-((R)-2-hydroxy-4-methyl-pentanoyl)-piperazin-1-yl]-quinazoline-7-carboxylic acid

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Reaction Steps

To a solution of 2,4-dichloroquinazoline-7-carboxylic acid (0.45 g, 1.9 mmol) in CH2Cl2 (20 mL) was added (R)-2-hydroxy-4-methyl-1-piperazin-1-yl-pentan-1-one (0.37 g, 1.9 mmol) and triethylamine (0.52 mL, 3.7 mmol). The reaction mixture was stirred overnight at room temperature and then purified via silica gel chromatography using 0-10% MeOH/CH2Cl2 to obtain 2-chloro-4-[4-((R)-2-hydroxy-4-methyl-pentanoyl)-piperazin-1-yl]-quinazoline-7-carboxylic acid (0.58 g, 77%). LC/MS: m/z 407.3 (M+H)+ at 2.44 min (10%-99% CH3CN (0.035% TFA)/H2O (0.05% TFA)).

Provenance & Evidence