Morpholine → 4-[[(1R)-3-(4-Morpholinyl)-3-oxo-1-[(phenylthio)methyl]propyl]amino]-3-trifluoromethylsulfonyl-benzenesulfonamide

Participants

Reaction Steps

A solution of (R)-4-(phenylthio)-3-(4-sulfamoyl-2-(trifluoromethylsulfonyl)phenylamino) butanoic acid (INTERMEDIATE 8, 1.99 g, 4.01 mmol) and HATU (1.83 g, 4.82 mmol) in DMA (18.0 ml) was treated with morpholine (0.35 ml, 4.02 mmol) and DIPEA (1.40 ml, 8.02 mmol). The resulting reaction mixture was stirred at room temperature for 1 hour and then diluted with EtOAc (250 ml). The organic layer was washed with water (3×250 ml), 1M aq. NaHSO4 (200 ml), and saturated aq. NaHCO3 (200 ml). The organic layer was dried (Na2SO4), filtered, and evaporated under reduced pressure to provide a sticky foam. The foam was dissolved in EtOAc (40 ml) and washed with water (2×250 ml). During the second wash material precipitated. EtOAc (80 ml) was added and the resulting mixture was shaken, resulting in redissolution of the precipitate. The mixture was further dried (Na2SO4), filtered, and evaporated under reduced pressure. The residue was dissolved in a few ml of DCM resulting in the formation of a precipitate. Finally, evaporation of the volatiles under reduced pressure afforded the title product (2.02 g, yield: 89%).

Provenance & Evidence