1: furolt;3,2-bgt;pyridine With n-butyllithium in tetrahydrofuran T=-78°C; 1 h; 2: N,N-dimethyl-formamide in tetrahydrofuran T=-78°C; 1 h; Further stages.;

1: bis-triphenylphosphine-palladium(II) chloride; copper(l) iodide; piperidine / N,N-dimethyl-formamide / 60 °C / |Inert atmosphere 2: manganese(IV) oxide / dichloromethane / |Sonication; |Inert atmosphere View Scheme

hydroxylamine hydrochloride in pyridine; acetic anhydride T=100°C;

hydroxylamine hydrochloride; potassium carbonate in ethanol 2 h; Ambient temperature;

1: 91 percent / hydroxylamine hydrochloride, K2CO3 / aq. ethanol / 2 h / Ambient temperature 2: 64 percent / 2,4,6-trichloro-s-triazine, pyridine / CH2Cl2 / 1.5 h / Heating 3: 95 percent / KOH / aq. ethanol / 2 h / Heating View Scheme

potassium hydroxide; hydrazine hydrate in ethanol 1 h; Heating;