2-Methyl-3-buten-2-ol → HCID 54169282, compound

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Reaction Steps

A stirred solution of 5-bromo-3-(N-methyl-2(R)-pyrrolidinylmethyl)-1H-indole (WO-A-92/06973; 879 mg, 3.0 mmol), 2-methylbut-3-en-2-ol (0.408 ml, 3.9 mmol), tri-o-tolylphosphine (273 mg, 0.90 mmol), palladium(II) acetate (45 mg, 0.20 mmol), triethylamine (0.84 ml, 6.0 mmol) and acetonitrile (50 ml), under nitrogen, was heated under reflux for 24 hours, allowed to cool, then partitioned between ethyl acetate and 2M aqueous sodium carbonate solution. The organic phase was separated, washed sequentially with 2M aqueous sodium carbonate solution (×2) and brine (×1), dried (Na2SO4) and evaporated under reduced pressure. The crude product was purified by column chromatography on silica gel, eluting with a solvent gradient of 0.880 aqueous ammonia:methanol: dichloromethane (0:5:95 to 0.5:5:95), to afford the title compound as a solid (226 mg), m.p. 155°-158° C. Rf 0.10 (SS 1). [α]D25 +81° (c=0.1, CH3OH). Found: C,75.27; H,8.96; N,8.99. C19H26N2O; 0.25 H2O requires C,75.33; H,8.82; N,9.25%.

Provenance & Evidence