反应详情

To a solution of 3-chloro-5-methoxybenzyl alcohol (14.7 mmol, 2.54 g) in DCM (20 ml) was added Et3N (22 mmol, 2.23 g, 3.1 ml) and the solution was cooled to −10° C. on an acetone-ice batch. Methanesulfonic chloride (17.7 mmol, 2.03 g, 1.4 ml) was added dropwise under stirring. After 45 min the mixture was separated between DCM and H3PO4 (5% v/v in water, cold). The organic phase was washed with H3PO4 (5% v/v in water, cold), NaHCO3 (10% in water, cold), brine and dried (MgSO4). Filtration and removal of solvents under reduced pressure yielded the title compound (3.43 g, 93%) as a white solid. The product was used in the next step without further purification. 1H NMR (CDCl3, 500 MHz) δ 2.97 (s, 3H), 3.82 (s, 3H), 5.16 (s, 2H), 6.82 (s, 1H), 6.90 (s, 1H) and 6.98 (s, 1H).

1. customAfter 45 min the mixture was separated between DCM and H3PO4 (5% v/v in water, cold)
2. washThe organic phase was washed with H3PO4 (5% v/v in water, cold), NaHCO3 (10% in water, cold), brine
3. dry with materialdried (MgSO4)
4. filtrationFiltration and removal of solvents under reduced pressure