Ammonium Hydroxide → 7-amino-10a-(4-methoxyphenyl)-1-[(3-methyl-1,2-oxazol-4-yl)carbonyl]-2,3,10,10a-tetrahydro-1H,5H-imidazo[1,2-a]pyrrolo[1,2-d]-pyrazin-5-one

Participants

Reaction Conditions

Reaction Steps

To a solution of 10a-(4-methoxyphenyl)-1-[(3-methyl-1,2-oxazol-4-yl)carbonyl]-7-nitro-2,3,10,10a-tetrahydro-1H,5H-imidazo[1,2-a]pyrrolo[1,2-d]pyrazin-5-one (107 mg, 0.24 mmol) in MeOH (2.4 mL) was added Iron(II) heptahydrate sulfate (544 mg, 2 mmol) in water (2.4 mL). A solution of ammonium hydroxide (28%, 0.7 mL) was added and the mixture was heated at 50° C. for 45 min. The reaction mixture was then partially concentrated in vacuo (half volume), neutralized with a saturated aqueous solution of NH4Cl and then extracted with EtOAc. The combined organic layers were dried (Na2SO4), filtrated and concentrated in vacuo to give a residue that was purified by flash chromatography (Biotage SP4 gradient 0-7% MeOH in EtOAc) to give 7-amino-10a-(4-methoxyphenyl)-1-[(3-methyl-1,2-oxazol-4-yl)carbonyl]-2,3,10,10a-tetrahydro-1H,5H-imidazo[1,2-a]pyrrolo[1,2-d]pyrazin-5-one (111) (38 mg, yield 39%).

Provenance & Evidence