Water → 3-(2-Benzyloxy-ethoxymethyl)-4-(4-chloro-phenylsulfanyl)-5,8-difluoro-chroman

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Reaction Steps

Trans-[4-(4-chloro-phenylsulfanyl)-5,8-difluoro-chroman-3-yl]-methanol (0.6 g, 1.65 mmole) and (2-bromo-ethoxymethyl)-benzene (0.71 g, 3.3 mmole) were dissolved in 30 ml THF and NaH (0.5 g) was added. The reaction was stirred at room temperature overnight. (2-Bromo-ethoxymethyl)-benzene (0.71 g, 3.3 mmole) and NaH (0.5 g) were added and the reaction was refluxed overnight. 50 ml water and 50 ml EtOAc were added. The organic layer washed with Sat. NaCl solution (50 ml), dried over Na2SO4 and concentrated. The product was purified by column chromatography (EtOAc/Hex. from 0/100 to 25/75 in 40 minute). Yield: 0.42 g, 53%. 1H NMR (CDCl3 400 MHz δ 7.42 (d, J=8.8 Hz, 2H), 7.25-7.37 (m, 7H), 6.96 (m, 1H), 6.57 (m, 1H), 4.60 (dd, J=11.7 and 2.2 Hz, 1H), 4.52 (bs, 3H), 4.40 (t, J=11.0, 1H), 3.3-3.56 (m, 6H), 2.38 (m, 1H).

Provenance & Evidence