Sulfuric Acid → HCID 59454966, compound

Participants

Reaction Steps

1-(8-Chloro-1,2,3,4-tetrahydro-2-methylpyrido[4,3-b]indol-5-yl)-2-(pyrimidin-5-yl)propan-2-ol (1 g, 2.80 mmol, 1 eq.) was refluxed with 25% sulfuric acid (7 ml) for 2 h. The reaction mixture was cooled to 5 deg C. in ice-water bath. KOH (15% aqueous solution) was added dropwise to the reaction mixture till pH of 9-10 was achieved. The reaction mixture was extracted with EtOAc (3×10 mL). The combined organic layer was washed with water (10 ml) followed by brine, dried over sodium sulfate and evaporated under vacuum. The crude product was purified by silica gel chromatography (100-200 mesh) using a gradient of MeOH-EtOAc (0-10%) followed by preparative HPLC. 1H NMR (CD3OD, TFA salt) δ (ppm): 9.20 (s, 1H), 9.10 (s, 2H), 7.58 (s, 1H), 7.30-7.20 (m, 3H), 4.78 (m, 1H), 4.40 (m, 1H), 3.90 (m, 1H), 3.60 (m, 1H), 3.20 (m, 2H), 3.10 (s, 3H), 2.0 (s, 3H).

Provenance & Evidence