2-Phenylindole → 3-Nitroso-2-phenyl-1H-indole

Participants

Reaction Steps

A solution of 2-phenylindole (27) (25 gm, 0.129 mol) in acetic acid (250 mL) was cooled to 18° C. and a solution of sodium nitrite (8 g, 0.115 mol) in water (10 mL) was added dropwise while keeping the temperature of the reaction at ca. 20° C. The resulting reaction was stirred for 30 min at room temperature then diluted with ice water (250 mL). The reaction mixture was was filtered and the solid was washed with water then recrystallized using methanol to provide Compound 28. Yield=27.5 gm (96.4%). ES-MS: 223.22 (M++1); NMR (DMSO-d6): 7.0 (m, 1H), 7.1 (m, 1H), 7.22 (m, 1H), 7.32 (m, 2H), 7.40 (m, 1H), 7.48 (m, 2H), 7.60 (m, 1H).

Provenance & Evidence