Lithium hydroxide, monohydrate → (R)-3-hydroxy-4-(4-(2-(2-hydroxyphenyl)-7-methylquinazolin-4-yl)piperazin-1-yl)-4-oxobutanoic acid

Participants

Reaction Steps

(R)-Methyl 3-hydroxy-4-(4-(2-(2-hydroxyphenyl)-7-methylquinazolin-4-yl)piperazin-1-yl)-4-oxobutanoate (88 mg, 0.20 mmol) and LiOH.H2O (33 mg, 0.78 mmol) were stirred in THF:H2O 1:1 at room temperature for 3 h. After acidification with 1 M HCl and extraction with EtOAc, the organic extracts were washed with water, dried over Na2SO4, and concentrated. The crude material was then purified via silica gel chromatography using 0-10% MeOH/CH2Cl2 to obtain (R)-3-hydroxy-4-(4-(2-(2-hydroxyphenyl)-7-methylquinazolin-4-yl)piperazin-1-yl)-4-oxobutanoic acid (75 mg, 88%). LC/MS: m/z 437.3 (M+H)+ at 2.04 min (10%-99% CH3CN (0.035% TFA)/H2O (0.05% TFA)).

Provenance & Evidence