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

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Reaction Steps

To a mixture of 4-(1-ethyl-4-methyl-1H-pyrazol-5-yl)-2-thiophenecarboxylic acid (240 mg, 1.02 mmol) and bromo-tris-pyrrolidino phosphoniumhexafluorophosphate (Pybrop) (568 mg, 1.22 mmol) was added DIPEA (1.77 ml, 10.16 mmol). After 10 min, 2-{(2S,4Z)-2-amino-4-[(1E)-1-(trifluoromethyl)-1-propen-1-yl]-4,6-heptadiene-1-yl}-1H-isoindole-1,3(2H)-dione (425 mg, 1.22 mmol) was added. After 2 h, the solution was concentrated and purified via column chromatography (silica, 20-50% EtOAc/Hexane) affording the title compound (365 mg, 63%) as a white solid: LC-MS (ES) m/z 567 (M+H)+.

Provenance & Evidence