Hydrogen Bromide → 6-(N-(4-Bromo-3-(2-hydroxyethyl)phenyl)methylsulfonamido)-5-cyclopropyl-2-(4-fluorophenyl)-N-methylbenzofuran-3-carboxamide

Participants

Reaction Conditions

Reaction Steps

To a solution of 6-(N-(4-amino-3-(2-hydroxyethyl)phenyl)methylsulfonamido)-5-cyclopropyl-2-(4-fluorophenyl)-N-methylbenzofuran-3-carboxamide (250 mg, 0.465 mmol) in MeCN (1 mL) maintained at 0° C. was added sodium nitrite (80 mg, 1.16 mmol) dissolved in water (0.50 mL). followed by 48% aqueous HBr (0.25 mL). The resulting mixture was treated with copper(I) bromide (133 mg, 0.930 mmol) in 48% aqueous HBr (0.30 mL). After stirring at 60° C. for 1 hour the reaction mixture was cooled to RT, diluted with water and extracted with EtOAc. The organic solution was washed with water, dried over sodium sulfate, and concentrated to dryness at reduced pressure. The crude product was purified by flash chromatography (silica gel, hexane/EtOAc) to afford the title compound in 65% yield. 1H NMR (400 MHz, DMSO-d6) δ ppm 8.36-8.51 (m, 1H) 8.05 (s, 1H) 7.92 (dd, J=8.89, 5.37 Hz, 2H) 7.49-7.62 (m, 1H) 7.31-7.49 (m, 3H) 7.09-7.26 (m, 2H) 4.69 (t, J=5.28 Hz, 1H) 3.46-3.60 (m, 2H) 3.30-3.40 (m, 3H) 2.72-2.87 (m, 5H) 2.04-2.22 (m, 1H) 0.70-1.06 (m, 3H) 0.41 (br. s., 1H).). LCMS (m/z, ES+)=601,603 (M+H+).

Provenance & Evidence