Diisopropylamine → 4-(4-Methoxybut-1-yn-1-yl)-2,3-methylendioxyaniline

Participants

Reaction Steps

A solution of 4-iodo-2,3-methylenedioxyaniline (1.32 g, 5.00 mmol) and 4-methoxybut-1-yne (0.84 g, 10.00 mmol) in ethyl acetate (25 ml) was cooled in ice-methanol, under an atmosphere of nitrogen, then treated with bis(triphenylphosphine) palladium(II) dichloride (350 mg, 10 mol %) followed by copper(I) iodide (95 mg, 10 mol %) and diisopropylamine (1.40 ml, 10.0 mmol). The reaction was stirred for 2 hours in the cooling bath and then allowed to warm to room temperature over 4 hours: The mixture was filtered through Celite and the filtrate was then purified by column chromatography on silica using a gradient of methanol in dichloromethane (0–2%) as eluent to give 4-(4-methoxybut-1-yn-1-yl)-2,3-methylendioxyaniline (524 mg, 82%) as a dark oil; LCMS: M+H+ 220 (82%).

Provenance & Evidence