1.1: potassium carbonate; copper(II) sulfate / methanol 2.1: pyridine / dichloromethane / 6 h / 20 °C 3.1: sodium iodide / N,N-dimethyl-formamide / 4 h / 100 °C 4.1: dichloromethane; pyridine / 20 °C 5.1: 1,8-diazabicyclo[5.4.0]undec-7-ene / tetrahydrofuran / 2 h / |Reflux 6.1: tributylphosphine / tetrahydrofuran; water / 0 °C 6.2: 5 h 7.1: 3-chloro-benzenecarboperoxoic acid / dichloromethane / 2 h 8.1: sodium methylate / methanol / 0.5 h / 20 °C 8.2: resin Amberlite IR-120, H+ 9.1: palladium on carbon; hydrogen; ammonium formate / methanol; water / 48 h / 20 °C / 760.05 Torr View Scheme

disodium hydrogenphosphate; hydroxylamine-o-sulphonic acid 1.) water, pH=7.5, 0 to 4 deg C, 3 d; 2.) pyridine, 100 deg C, 60 min; Yield given. Multistep reaction;