(+-)-3,4-Dimethoxyamphetamine → HCID 12049967, compound

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Reaction Steps

To a stirred solution of 3-(3,4-dimethoxyphenyl)-2-aminopropane (1.95 grams, 10.0 mmol) and sodium carbonate (1.06 grams, 10.0 mmol) in 50 milliliters of water was added N-carbethoxyphthalimide (2.19 grams, 10.0 mmol). After 10 minutes the reaction mixture was diluted with 40 milliliters of acetonitrile and the mixture stirred for 40 minutes The reaction solution was partially concentrated in vacuo to remove the acetonitrile. The resulting mixture of an oil and aqueous layer was extracted with methylene chloride (25 milliliters). The organic extract was dried over sodium sulfate and concentrated in vacuo to afford a crude product which was purified by flash chromatography to afford 1.73 grams (53%) of product as a thick oil which slowly solidified to a white wax: 1H NMR (dmso-d6, 250 MHz) δ7.7 (m, 4 H, Ar), 6.7 (m, 3 H, Ar), 4.63 (m, 1 H, CH), 3.79 (s, 3 H, OMe), 3.73 (s, 3 H, OMe), 3.28 (dd, 1 H, J =13.8, 9.8 Hz), 3.03 (dd, J=13.8, 6.5 Hz, 1 H), 1.54 (d, J=6.9 Hz, 3 H); 13C NMR (dmso-d6) δ168.4, 148.6, 147.4, 133.7, 131.8, 130.9, 122.9, 120.9, 111.1, 55.7, 55.6, 48.6, 39.3, 18.3. Anal. Calcd for C19H19NO2. Theoretical C, 70.14; H, 5.89; N, 4.30. Found C, 70.08; H, 5.83; N, 4.30.

Provenance & Evidence