1: With bis-triphenylphosphine-palladium(II) chloride; tetraethylammonium chloride in N,N-dimethyl-formamide T=100°C; 3 h; Inert atmosphere; 2: With hydrogenchloride in methanol; N,N-dimethyl-formamide T=20°C; 1 h; Inert atmosphere;

selenium(IV) oxide in 1,4-dioxane 14 h; Heating; Yield given. Yields of byproduct given;

1.1: 3-chloro-benzenecarboperoxoic acid / dichloromethane / 5 h / 20 °C / |Inert atmosphere 2.1: oxalyl dichloride / N,N-dimethyl-formamide; dichloromethane / 1 h / 20 °C / |Inert atmosphere 3.1: trifluorormethanesulfonic acid; trimethyl orthoformate / methanol; nitromethane / 2 h / 100 °C / |Inert atmosphere 4.1: bis-triphenylphosphine-palladium(II) chloride; tetraethylammonium chloride / N,N-dimethyl-formamide / 3 h / 100 °C / |Inert atmosphere 4.2: 1 h / 20 °C / |Inert atmosphere View Scheme

1.1: palladium diacetate; triethylamine; triphenylphosphine / N,N-dimethyl-formamide / 2 h / 100 °C / |Inert atmosphere 2.1: sodium acetate; hydroxylamine hydrochloride / ethanol / 2 h / 80 °C / |Inert atmosphere 3.1: 1,2-dichloro-benzene / 1.5 h / 180 °C / |Inert atmosphere 4.1: 3-chloro-benzenecarboperoxoic acid / dichloromethane / 5 h / 20 °C / |Inert atmosphere 5.1: oxalyl dichloride / N,N-dimethyl-formamide; dichloromethane / 1 h / 20 °C / |Inert atmosphere 6.1: trifluorormethanesulfonic acid; trimethyl orthoformate / methanol; nitromethane / 2 h / 100 °C / |Inert atmosphere 7.1: bis-triphenylphosphine-palladium(II) chloride; tetraethylammonium chloride / N,N-dimethyl-formamide / 3 h / 100 °C / |Inert atmosphere 7.2: 1 h / 20 °C / |Inert atmosphere View Scheme

1.1: sodium acetate; hydroxylamine hydrochloride / ethanol / 2 h / 80 °C / |Inert atmosphere 2.1: 1,2-dichloro-benzene / 1.5 h / 180 °C / |Inert atmosphere 3.1: 3-chloro-benzenecarboperoxoic acid / dichloromethane / 5 h / 20 °C / |Inert atmosphere 4.1: oxalyl dichloride / N,N-dimethyl-formamide; dichloromethane / 1 h / 20 °C / |Inert atmosphere 5.1: trifluorormethanesulfonic acid; trimethyl orthoformate / methanol; nitromethane / 2 h / 100 °C / |Inert atmosphere 6.1: bis-triphenylphosphine-palladium(II) chloride; tetraethylammonium chloride / N,N-dimethyl-formamide / 3 h / 100 °C / |Inert atmosphere 6.2: 1 h / 20 °C / |Inert atmosphere View Scheme

1.1: 1,2-dichloro-benzene / 1.5 h / 180 °C / |Inert atmosphere 2.1: 3-chloro-benzenecarboperoxoic acid / dichloromethane / 5 h / 20 °C / |Inert atmosphere 3.1: oxalyl dichloride / N,N-dimethyl-formamide; dichloromethane / 1 h / 20 °C / |Inert atmosphere 4.1: trifluorormethanesulfonic acid; trimethyl orthoformate / methanol; nitromethane / 2 h / 100 °C / |Inert atmosphere 5.1: bis-triphenylphosphine-palladium(II) chloride; tetraethylammonium chloride / N,N-dimethyl-formamide / 3 h / 100 °C / |Inert atmosphere 5.2: 1 h / 20 °C / |Inert atmosphere View Scheme

1.1: oxalyl dichloride / N,N-dimethyl-formamide; dichloromethane / 1 h / 20 °C / |Inert atmosphere 2.1: trifluorormethanesulfonic acid; trimethyl orthoformate / methanol; nitromethane / 2 h / 100 °C / |Inert atmosphere 3.1: bis-triphenylphosphine-palladium(II) chloride; tetraethylammonium chloride / N,N-dimethyl-formamide / 3 h / 100 °C / |Inert atmosphere 3.2: 1 h / 20 °C / |Inert atmosphere View Scheme

1.1: trifluorormethanesulfonic acid; trimethyl orthoformate / methanol; nitromethane / 2 h / 100 °C / |Inert atmosphere 2.1: bis-triphenylphosphine-palladium(II) chloride; tetraethylammonium chloride / N,N-dimethyl-formamide / 3 h / 100 °C / |Inert atmosphere 2.2: 1 h / 20 °C / |Inert atmosphere View Scheme

1: SOCl2 / 1.5 h / Heating 2: isoamylether, 0 deg C, 1 h View Scheme

isoamylether, 0 deg C, 1 h; Yield given. Multistep reaction;