jones reagent in acetone 24 h;

1: 4N LiOH 2: 6.5 g / Jones reagent / acetone / 24 h View Scheme

1: 55 percent / thionyl chloride / dioxane / 1 h / Ambient temperature 2: 4N LiOH 3: 6.5 g / Jones reagent / acetone / 24 h View Scheme

1: toluene-4-sulfonic acid / orthoformic acid triethyl ester / 3 h / 80 - 90 °C 2: aluminum isopropoxide / toluene; butanone / Reflux 3: hydroxylamine hydrochloride; pyridine / ethanol / 20 °C / Inert atmosphere 4: thionyl chloride / tetrahydrofuran / 0 - 20 °C 5: hydrogenchloride; water / tetrahydrofuran / 1 h / 25 °C View Scheme

1: aluminum isopropoxide / toluene; butanone / Reflux 2: hydroxylamine hydrochloride; pyridine / ethanol / 20 °C / Inert atmosphere 3: thionyl chloride / tetrahydrofuran / 0 - 20 °C 4: hydrogenchloride; water / tetrahydrofuran / 1 h / 25 °C View Scheme

1: hydroxylamine hydrochloride; pyridine / ethanol / 20 °C / Inert atmosphere 2: thionyl chloride / tetrahydrofuran / 0 - 20 °C 3: hydrogenchloride; water / tetrahydrofuran / 1 h / 25 °C View Scheme