Lithium hydroxide, monohydrate → 3-Amino-1-(3-(trifluoromethyl)-5,6-dihydro(1,2,4)triazolo(4,3-a)pyrazin-7(8H)-yl)-4-(2,4,5-trifluorophenyl)butan-1-one

Participants

Reaction Conditions

Reaction Steps

In a 25 mL three neck flask (2S) N-trifluoroacetyl-4-oxo-4-[3-(trifluoromethyl)-5,6-dihydro[1,2,4]triazolo[4,3-a]pyrazin-7(8H)-yl]-1-(2,4,5-trifluorophenyl)butan-2-amine (wt.-0.250 g, % Purity by HPLC-96.5%) was dissolved in a mixture of MeOH (2.5 mL) and water (0.5 mL) at 25-30° C. To the reaction mixture lithium hydroxide monohydrate (21 mg) was added. It was stirred at 0 to 5° C. for 4 h and at 25 to 30° C. for 24 h. Distilled out solvent at reduced pressure on Buchi rotavapour. To the thick liquid water (2.5 mL) was added. It was transferred into a separating funnel. It was extracted twice with ethyl acetate. Both the extracts were combined and washed with water and brine solution. It was dried over anhydrous sodium sulfate. Distilled out solvent to obtain a 4-oxo-4-[3-(trifluoromethyl)-5,6-dihydro[1,2,4]triazolo[4,3-a]pyrazin-7(8H)-yl]-1-(2,4,5-trifluorophenyl)butan-2-amine (Wt.-78 mg, % Purity by HPLC-83.1%).

Provenance & Evidence