1.1: 53 percent / AcOH / 3 h / 110 °C 2.1: 81 percent / pyridine / CH2Cl2 / 1 h / cooling 3.1: 90 percent / Et4NCl; PdCl2(PPh3)2 / dimethylformamide / 1.5 h / 110 °C 4.1: Mg; 1,2-dibromoethane / tetrahydrofuran 4.2: tetrahydrofuran / 2 h / 20 °C 4.3: 87 percent / H2O2; KHCO3; KF / tetrahydrofuran; methanol / 3 h / 20 °C 5.1: 92 percent / imidazole / dimethylformamide / 1 h / 20 °C 6.1: 85 percent / pyridinium chlorochromate; celite / CH2Cl2 / 10 h / 20 °C 7.1: 57 percent / NH2OH*HCl; AcONa / ethanol / 1 h / 85 °C 8.1: 49 percent / various solvent(s) / 1 h / 180 °C 9.1: 89 percent / tetrabutylammonium fluoride / tetrahydrofuran / 1 h / 20 °C 10.1: PhLi / cyclohexane; diethyl ether; dioxane / 0.17 h / cooling 10.2: 78 percent / cyclohexane; diethyl ether; dioxane / 12 h / 20 °C 11.1: 96 percent / BF3*Et2O; Me2S / CH2Cl2 / 18 h / 20 °C 12.1: 95 percent / salcomine; O2 / dimethylformamide / 2 h / 20 °C View Scheme

1.1: 53 percent / AcOH / 3 h / 110 °C 2.1: 81 percent / pyridine / CH2Cl2 / 1 h / cooling 3.1: 90 percent / Et4NCl; PdCl2(PPh3)2 / dimethylformamide / 1.5 h / 110 °C 4.1: Mg; 1,2-dibromoethane / tetrahydrofuran 4.2: tetrahydrofuran / 2 h / 20 °C 4.3: 87 percent / H2O2; KHCO3; KF / tetrahydrofuran; methanol / 3 h / 20 °C 5.1: 92 percent / imidazole / dimethylformamide / 1 h / 20 °C 6.1: 85 percent / pyridinium chlorochromate; celite / CH2Cl2 / 10 h / 20 °C 7.1: 57 percent / NH2OH*HCl; AcONa / ethanol / 1 h / 85 °C 8.1: 49 percent / various solvent(s) / 1 h / 180 °C 9.1: 89 percent / tetrabutylammonium fluoride / tetrahydrofuran / 1 h / 20 °C 10.1: PhLi / cyclohexane; diethyl ether; dioxane / 0.17 h / cooling 10.2: 64 percent / cyclohexane; diethyl ether; dioxane / 0.5 h / 20 °C 11.1: 81 percent / NaN3 / H2O; dioxane / 1 h / 60 °C 12.1: PPh3 / benzene / 12 h / 20 °C 12.2: 45 percent / benzene / 0.08 h / 20 °C 13.1: 91 percent / H2 / Pd/C / ethanol / 2 h / 20 °C 14.1: 85 percent / salcomine; O2 / dimethylformamide / 2 h / 20 °C View Scheme

1.1: 53 percent / AcOH / 3 h / 110 °C 2.1: 81 percent / pyridine / CH2Cl2 / 1 h / cooling 3.1: 90 percent / Et4NCl; PdCl2(PPh3)2 / dimethylformamide / 1.5 h / 110 °C 4.1: Mg; 1,2-dibromoethane / tetrahydrofuran 4.2: tetrahydrofuran / 2 h / 20 °C 4.3: 87 percent / H2O2; KHCO3; KF / tetrahydrofuran; methanol / 3 h / 20 °C 5.1: 92 percent / imidazole / dimethylformamide / 1 h / 20 °C 6.1: 85 percent / pyridinium chlorochromate; celite / CH2Cl2 / 10 h / 20 °C 7.1: 57 percent / NH2OH*HCl; AcONa / ethanol / 1 h / 85 °C 8.1: 49 percent / various solvent(s) / 1 h / 180 °C 9.1: 89 percent / tetrabutylammonium fluoride / tetrahydrofuran / 1 h / 20 °C 10.1: PhLi / cyclohexane; diethyl ether; dioxane / 0.17 h / cooling 10.2: 64 percent / cyclohexane; diethyl ether; dioxane / 0.5 h / 20 °C 11.1: 85 percent / LiEt3BH / tetrahydrofuran / 0.17 h / cooling 12.1: 91 percent / H2 / Pd/C / ethanol / 2 h / 20 °C 13.1: 85 percent / salcomine; O2 / dimethylformamide / 2 h / 20 °C View Scheme

With  3-chloro-benzenecarboperoxoic acid in  dichloromethane Baeyer-Villiger reaction;