Ammonium formate → 4-(3-{[3-(2-Tert-butoxy-2-oxoethyl)-2,4-dioxo-1,2,3,4-tetrahydroquinazolin-7-yl]carbonyl}-2-methylindolizin-1-yl)benzoic acid

Participants

Reaction Steps

Palladium on carbon (10% active, 0.2 g) and benzyl 4-(3-{[3-(2-tert-butoxy-2-oxoethyl)-2,4-dioxo-1,2,3,4-tetrahydroquinazolin-7-yl]carbonyl}-2-methylindolizin-1-yl)benzoate (1 g, 1.55 mmol) are added, under nitrogen, to ammonium formate (0.97 g, 15.54 mmol) in solution in 15 mL of DMF. The reaction mixture is stirred for 3 h at ambient temperature and filtered through Celite, and the filtrate is concentrated to dryness. The solid obtained is taken up in diisopropyl ether. After filtration and drying under vacuum, 732 mg (yield: 85%) of a green solid are obtained.

Provenance & Evidence