Diisopropylethylamine → N-{(1S)-2-(2,5-difluorophenyl)-1-[(1,3-dioxo-1,3-dihydro-2H-isoindol-2-yl)methyl]ethyl}-4-(1-methyl-1H-pyrazol-5-yl)-2-thiophenecarboxamide

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Reaction Steps

To a 50 mL round-bottomed flask was added 4-(1-methyl-1H-pyrazol-5-yl)-2-thiophenecarboxylic acid (257 mg, 0.93 mmol) [prepared according to the procedure of Example 146], 2-[(2S)-2-amino-3-(2,5-difluorophenyl)propyl]-1H-isoindole-1,3(2H)-dione (476 mg, 0.81 mmol) [prepared according to the procedure of Preparation 18 except substituting 2,5-difluoro-L-phenylalanine (3.02 g, 15.0 mmol) for 2,6-difluoro-L-phenylalanine] and PyBrop (535 mg, 1.14 mmol) in Chloroform (15 mL). DIEA (0.808 mL, 4.63 mmol) was added and the reaction stirred overnight at room temperature. The mixture was adsorbed onto silica and purified via column chromatography (25-75% EtOAc/Hex) affording the title compound (225 mg, 34%): LC-MS (ES) m/z=507 (M+H)+

Provenance & Evidence