Triphenylphosphine → 3-[4-carbamoyl-2-(2-quinolin-5-yl-ethoxy)-benzenesulfonylamino]-N-methoxy-N-methyl-succinamic acid tert-butyl ester

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Reaction Steps

To a methylene chloride solution of 3-(4-carbamoyl-2-hydroxy-benzenesulfonylamino)-N-methoxy-N-methyl-succinamic acid tert-butyl ester at room temperature was added triphenylphosphine (0.25 g, 0.95 mmol), 2-quinolin-5-yl-ethanol (0.11 g, 0.66 mmol) and diethyl azodicarboxylate (0.17 ml, 1.12 mmol). The reaction was stirred at room temperature for 3 days. The reaction was then concentrated under reduced pressure. The crude residue was chromatographed [silica gel with a gradient of 100% ethyl acetate to 10% (1:9 NH4OH/ethanol) in ethyl acetate] to give 3-[4-carbamoyl-2-(2-quinolin-5-yl-ethoxy)-benzenesulfonylamino]-N-methoxy-N-methyl-succinamic acid tert-butyl ester as a white foam (0.27 g, 69%). 1H NMR(300 MHz, DMSO) 8.90 (d, 1H), 8.73 (d, 1H), 8.08 (s, 1H), 7.93 (d, 1H), 7.62 (m, 8H), 4.43 (m, 3H), 3.71 (m, 2H), 3.47 (bs, 3H), 2.77 (bs, 3H), 2.54 (dd, 1H), 2.34 (dd, 1H), 1.31 (s, 9H). MS(APCI) m/z 585.1 (M−H), 587.1 (M+1).

Provenance & Evidence