1: 1-Bromo-4-t-butoxycarbonylaminobenzene With sodium hydride in tetrahydrofuran T=0°C; 0.25 h; 2: methyl iodide in tetrahydrofuran T=20°C; 3: With phosphoric acid in tetrahydrofuran; water

in ethanol T=20°C; 70 h;

1.1: potassium salt of diphenylphosphine anion / tetrahydrofuran / 2 h / -78 °C / |Inert atmosphere 1.2: 0.5 h / 20 °C / |Inert atmosphere 2.1: sodium hydroxide / tetrahydrofuran; water / 12 h / |Inert atmosphere View Scheme

sodium hydroxide in tetrahydrofuran; water 12 h; Inert atmosphere;

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