Methyl iodide → HCID 86702153, compound

Participants

Reaction Conditions

Reaction Steps

To a −78° C. solution of 2-(2,4-dimethoxybenzyl)isothiazolidine-1,1-dioxide (0.600 g, 2.2 mmol) in anhydrous tetrahydrofuran (29 mL) was slowly added n-butyl lithium (1.725 mL of a 2.5 N solution in hexanes, 4.3 mmol). The reaction mixture was stirred for 1 hr at −78° C., iodomethane (0.688 mL, 11.1 mmol) was added, and the resulting mixture stirred for 2.5 hrs at −78° C. and 30 mins at room temperature. The mixture was poured into saturated aqueous ammonium chloride and extracted with ethyl acetate. The organic layer was washed with saturated aqueous sodium chloride, dried (anhydrous sodium sulfate), filtered, and concentrated in vacuo. The crude material was purified by silica gel chromatography (20-60% ethyl acetate/hexanes) to give the product as a clear oil (0.3 g). 1H NMR (CDCl3, 300 MHz) δ 7.25-7.22 (d, 1H, J=8.1 Hz), 6.48-6.43 (m, 2H), 4.27-4.13 (q, 2H, J=14.1 Hz), 3.80 (s, 3H), 3.79 (s, 3H), 3.25-3.02 (m, 3H), 2.43-2.32 (m, 1H), 1.95-1.83 (m, 1H), 1.42-1.40 (d, 3H, J=6.6 Hz).

Provenance & Evidence