Propargyl bromide → 1-(propa-1,2-dienyl)-7-(1,2,3,4-tetrahydroisoquinolin-2-yl)-2,3-dimethyl-1H-pyrrolo[2,3-c]pyridine hydrochloride

Participants

Reaction Steps

Sodium hydride (60%; 80 mg, 1.80 mmol) and propargyl bromide (35.6 μl, 1.40 mmol) were added at 0° C. to a solution of 7-(1,2,3,4-tetrahydroisoquinolin-2-yl)-2,3-dimethyl-1H-pyrrolo[2,3-c]pyridine hydrochloride (92,3 mg, 0.33 mol) prepared in Example 468 in anhydrous tetrahydrofuran (10 ml). The reaction mixture was stirred for 12 hours at room temperature. Ice was added to the reaction mixture, which was then 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 (n-hexane/ethyl acetate=1/1, v/v). The resulting product was dissolved in ethyl acetate, saturated with hydrochloric acid gas, and then filtered to give 32.5 mg of the titled compound as a white solid.

Provenance & Evidence