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Synthesis of Sodium (E)-2-Methoxy-5-(2-(2′,4′,6′-trimethoxyphenyl)vinylsulfon-amido) phenyl phosphate (6r)a
aReagents and conditions: (a) phosphorus oxychloride, THF, triethylamine, 0 °C-room temp, 3 h; (b) water, room temperature,18 h, 69%; (c) 25% aq.NaOH, CH3OCH2CH2OCH3, 0 °C-room temp, 3 h, 85%.
