4-Methylmorpholine → 3-(2-Methoxyphenylsulfonyloxy)-5-methylphenol

Participants

Reaction Steps

4-Methylmorpholine (3.2 mL, 29.1 mmol) was added to a mixture of 3-(5-chloro-2-methoxyphenylsulfonyloxy)-5-methylphenol (8.82 g, 26.8 mmol, prepared in the preceding step) and 10% palladium on carbon(2.23 g) in deoxygenated methanol (15 mL). The mixture was stirred at ambient temperature under hydrogen (balloon) for 3 h, then filtered through Celite (drafomaceous earth) with methanol. Solvent was removed in vacuo and crude product was purified by flash column chromatography (CH2Cl2 to 5% ethyl acetate in dichloromethane) to give the title compound (4.97 g, 63%) as a colorless syrup. 1H-NMR (300 MHz, DMSO-d6) (9.71 (s, 1H), 7.76 (ddd, 1H, J=8.4, 7.4, 1.7 Hz), 7.69 (dd, 1H, J=7.9, 1.7 Hz), 7.38 (d, 1H, J=8.4 Hz), 7.09 (dt, 1H, J=7.9, 1.0 Hz), 6.48 (br s, 1H), 6.33 (br s, 1H), 6.26 (t, 1H, J=2.2 Hz), 4.00 (s, 3H), 2.15 (s, 3H). Mass spectrum (MALDI-TOF, α-cyano-4-hydroxycinnamic acid matrix) calcd. for C14H14O5S: 317.0 (M+Na). Found: 316.9.

Provenance & Evidence