4-Fluorophenylboronic acid → 7-[(2,5-Dioxopyrrolidin-1-yl)methyl]-4-(4-fluorophenyl)quinoline-2-carbonitrile

Participants

Reaction Conditions

Reaction Steps

To a room temperature solution of 4-fluorophenylboronic acid (5.96 g, 42.6 mmol, 1.2 equiv.) in dioxane:water (10:1, 177 mL, 0.2 M) was added sodium bicarbonate (5.96 g, 71.0 mmol, 2.0 equiv.), 4-chloro-7-[(2,5-dioxopyrrolidin-1-yl)methyl]quinoline-2-carbonitrile (2-5, 10.6 g, 35.5 mmol), and Pd(PPh3)4 (4.1 g, 3.55 mmol, 0.1 equiv.). The resulting mixture was warmed to 100° C. for 4 hr. The reaction was then cooled to 0° C. and a precipitate formed. The solids were then collected by vacuum filtration and washed with water and cold acetonitrile to afford 7-[(2,5-dioxopyrrolidin-1-yl)methyl]-4-(4-fluorophenyl)quinoline-2-carbonitrile (2-6) which was taken to the next step without further purification. 1H NMR (400 MHz, CDCl3): δ 8.115 (d, J=1.10 Hz, 1H); 7.897 (d, J=8.79 Hz, 1H); 7.655 (dd, J1=8.79 Hz, J2=1.83 Hz, 1H); 7.603 (s, 1H); 7.439-7.475 (m, 2H); 7.243-7.286 (m, 2H); 4.909 (s, 2H); 2.796 (s, 4H). LRMS m/z (M+H)+ 360.3 found, 360.1 required.

Provenance & Evidence