1.1: 93 percent / Zn / acetic acid / 0.5 h / 20 - 30 °C 2.1: SOCl2 / methanol / 20 h / 20 °C 3.1: K2CO3; NH2OH*HCl / dioxane; H2O / 12 h / 20 °C 3.2: 18.5 g / 3-dimethylaminopropylamine / dioxane; H2O / 1 h / 20 °C 4.1: 43 percent / McIlvaine's buffer cont. EDTA; thiothreitol / papain (from Carica papaya) / acetonitrile; dimethylformamide / 36 h / 20 °C / pH 6.2 / Enzymatic reaction 5.1: 81 percent / conc. HCl / methanol / 8 h / Heating View Scheme

1.1: 93 percent / Zn / acetic acid / 0.5 h / 20 - 30 °C 2.1: SOCl2 / methanol / 20 h / 20 °C 3.1: K2CO3; NH2OH*HCl / dioxane; H2O / 12 h / 20 °C 3.2: 18.5 g / 3-dimethylaminopropylamine / dioxane; H2O / 1 h / 20 °C 4.1: 43 percent / McIlvaine's buffer cont. EDTA; thiothreitol / papain (from Carica papaya) / acetonitrile; dimethylformamide / 36 h / 20 °C / pH 6.2 / Enzymatic reaction 5.1: 81 percent / conc. HCl / methanol / 8 h / Heating View Scheme

1.1: 93 percent / Zn / acetic acid / 0.5 h / 20 - 30 °C 2.1: SOCl2 / methanol / 20 h / 20 °C 3.1: K2CO3; NH2OH*HCl / dioxane; H2O / 12 h / 20 °C 3.2: 18.5 g / 3-dimethylaminopropylamine / dioxane; H2O / 1 h / 20 °C 4.1: 43 percent / McIlvaine's buffer cont. EDTA; thiothreitol / papain (from Carica papaya) / acetonitrile; dimethylformamide / 36 h / 20 °C / pH 6.2 / Enzymatic reaction View Scheme

1.1: 93 percent / Zn / acetic acid / 0.5 h / 20 - 30 °C 2.1: SOCl2 / methanol / 20 h / 20 °C 3.1: K2CO3; NH2OH*HCl / dioxane; H2O / 12 h / 20 °C 3.2: 18.5 g / 3-dimethylaminopropylamine / dioxane; H2O / 1 h / 20 °C 4.1: 43 percent / McIlvaine's buffer cont. EDTA; thiothreitol / papain (from Carica papaya) / acetonitrile; dimethylformamide / 36 h / 20 °C / pH 6.2 / Enzymatic reaction 5.1: 81 percent / conc. HCl / methanol / 8 h / Heating View Scheme

1.1: 93 percent / Zn / acetic acid / 0.5 h / 20 - 30 °C 2.1: SOCl2 / methanol / 20 h / 20 °C 3.1: K2CO3; NH2OH*HCl / dioxane; H2O / 12 h / 20 °C 3.2: 18.5 g / 3-dimethylaminopropylamine / dioxane; H2O / 1 h / 20 °C View Scheme