Benzyl Bromide → HCID 67141638, compound

Participants

Reaction Steps

18-Crown-6 (26 mg, 0.098 mmol) and potassium tert-butoxide (253 mg, 2.25 mmol) were added to a solution of 2,3-dimethyl-7-(4-methylsulfanylphenyl)-1H-pyrrolo[2,3-c]pyridine (300 mg, 0.98 mmol) prepared in Example 262 in anhydrous tetrahydrofuran (9 ml). The reaction mixture was stirred for 30 minutes at room temperature and benzyl bromide (175 μl, 1.47 mmol) was added thereto. The reaction mixture was stirred overnight. The reaction mixture was diluted with ethyl acetate and water was added thereto. The separated organic layer was dried on anhydrous magnesium sulfate, and then concentrated under reduced pressure. The resulting residue was purified with silica gel column chromatography. The resulting pale yellow solid (242 mg, 0.67 mmol) was dissolved in 6 ml of acetic acid. Ammonium cerium (IV) nitrate (1.11 g, 2.01 mmol) was added at room temperature to the resulting solution, which was stirred for 3 hours at 55° C. and then cooled to room temperature. Water was added to the reaction mixture, which was then extracted with ethyl acetate. The organic layer washed with a saturated sodium chloride solution, dried on anhydrous magnesium sulfate, and then concentrated under reduced pressure. The resulting residue was dissolved in methanol (11 ml) and 2N lithium hydroxide (3 ml) was added thereto. The reaction mixture was stirred for 1 hour at room temperature, neutralized with 1N hydrochloric acid, and then concentrated under reduced pressure. The resulting residue was extracted with ethyl acetate. The organic layer was dried on anhydrous magnesium sulfate and then concentrated under reduced pressure. The resulting residue was purified with silica gel column chromatography to obtain 1-benzyl-3-hydroxymethyl-2-methyl-7-(4-methylsulfanylphenyl)-1H-pyrrolo[2,3-c]pyridine. The product was dissolved in ethyl acetate, saturated with hydrochloric acid gas, and then filtered to give 48 mg of the titled compound as a white solid.

Provenance & Evidence