“…Excess dimethyl sulfate was removed by dissolving the oil in ether (200 mL), adding triethylamine (5 mL), and allowing the turbid solution which formed to stand for 1 h. The ether solution was washed with water (2 X 50 mL), hydrochloric acid (50 mL), and brine (50 mL) and finally dried (MgS04). Evaporation of the solvent gave 5.04 g (100%) of pure 7c as an oil: NMR (CC14) 1.36 (t, J = 7 Hz, 3, CH2CH3), 2.33 (s, 3, ArCH3), 3.79 (s, 3, OCH3), 3.84 (s, 3, OCH3), 4.36 (q, J = 7 Hz, 2, OCH3), 6.62 (d, J = 5 Hz, 1, ArH), 6.67 (d, J = 5 Hz, 1, ArH), 7.16 (s, 1, ArH), 7.0 (t, J = 5 Hz, ArH).…”