Hydrochloric Acid → 3-{2,5-Dichloro-4-[5-(4-cyclopropyl-3,4-dihydro-2H-quinoxaline-1-carbonyl)-2-methyl-pyridin-4-yloxy]-benzoylamino}-propionic acid

Participants

Reaction Steps

To a solution of 83 mg (0.139 mmol) 3-{2,5-dichloro-4-[5-(4-cyclopropyl-3,4-dihydro-2H-quinoxaline-1-carbonyl)-2-methyl-pyridin-4-yloxy]-benzoylamino}-propionic acid ethyl ester in 2 mL dioxane was added 2 mL water and 7 mg (0.174 mmol) lithium hydroxide monohydrate. The reaction mixture was stirred for 4 hours at room temperature. The reaction mixture was poured on 20 mL 1N aqueous hydrochloric acid and 20 mL ethyl acetate and the layers were separated. The aqueous layer was extracted with 20 mL ethyl acetate and the organic layers were washed with 30 mL brine, dried over magnesium sulfate, filtered and concentrated under vacuum to give the title compound as a light yellow solid (100%). MS (ESI): m/z=569.136 [M+H]+.

Provenance & Evidence