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

Participants

Reaction Steps

To a 500 mL round-bottomed flask was added 5-chloro-4-(1,4-dimethyl-1H-pyrazol-5-yl)-2-thiophenecarboxylic acid (6.8 g, 26.5 mmol), 2-[(2S)-2-amino-3-(3-fluorophenyl)propyl]-1H-isoindole-1,3(2H)-dione (8.69 g, 29.1 mmol), N,N-diisopropyl ethylamine (14 mL, 80 mmol) and Pybrop (18.52 g, 39.7 mmol) in dichloromethane (DCM) (100 mL). After stirring at RT for 1 h, the reaction solution was washed with H2O (2×100 mL) and the organic layer was dried Na2SO4, filtered and concentrated. The crude product was added to a silica gel column and was eluted with (EtOAc/hexanes, 1:1) to give the title compound (6.1 g, 42.9%) as a white solid: LCMS (ES) m/z 537 (M+H)+.

Provenance & Evidence