Dimethylformamide → (R)-3-[1-(4,6-dimethyl-1,2-benzisothiazol-3-ylmethyl)-2,4-dioxo-1,4-dihydro-2H-quinazolin-3-yl]-butyric acid methyl ester

Participants

Reaction Steps

(R)-3-(2,4-Dioxo-1,4-dihydro-2H-quinazolin-3-yl)-butyric acid methyl ester (124 mg, 0.5 mmol) (prepared according to example 4, steps 1-2), 3-bromomethyl-4,6-dimethyl-1,2-benzisothiazole (150 mg, 0.59 mmol) (prepared according to example 5, steps 1-6), and potassium carbonate (345.5 mg, 2.5 mmol) are combined in a reaction vial and DMF (1 mL) is added. The reaction mixture is agitated at ambient temperature for 18 hours then diluted with water (15 mL). The product is isolated by filtration and purified by flash chromatography using an ethyl acetate/hexane gradient to provide (R)-3-[1-(4,6-dimethyl-1,2-benzisothiazol-3-ylmethyl)-2,4-dioxo-1,4-dihydro-2H-quinazolin-3-yl]-butyric acid methyl ester (196 mg, 93%).

Provenance & Evidence