1: 65 percent / K2CO3, Cu / dimethylformamide / 14 h / Heating 2: 92 percent / SOCl2 / benzene / 2 h / Heating 3: 25 percent / powdered KOH / dimethylsulfoxide / 2 h / 25 - 30 °C 4: 1.) ZnI2, 2.) POCl3 / 1.) benzene, R.T. 8 h, 2.) pyridine, reflux 6 h. 5: 38 percent / NaBH4, 20 percent NaOH / ethanol / 11 h / Heating View Scheme

sodium hydroxide; sodium tetrahydroborate in ethanol 11 h; Heating;

2: 38 percent / NaBH4, 20 percent NaOH / ethanol / 11 h / Heating View Scheme

1: 72.5 g / NaOH / hexamethylphosphoric acid triamide; H2O / 7 h / 100 °C 3: 38 percent / NaBH4, 20 percent NaOH / ethanol / 11 h / Heating View Scheme

1: 65 percent / K2CO3, Cu / dimethylformamide / 14 h / Heating 2: 92 percent / SOCl2 / benzene / 2 h / Heating 3: 25 percent / powdered KOH / dimethylsulfoxide / 2 h / 25 - 30 °C 4: 1.) ZnI2, 2.) POCl3 / 1.) benzene, R.T. 8 h, 2.) pyridine, reflux 6 h. 5: 38 percent / NaBH4, 20 percent NaOH / ethanol / 11 h / Heating View Scheme

1: 92 percent / SOCl2 / benzene / 2 h / Heating 2: 25 percent / powdered KOH / dimethylsulfoxide / 2 h / 25 - 30 °C 3: 1.) ZnI2, 2.) POCl3 / 1.) benzene, R.T. 8 h, 2.) pyridine, reflux 6 h. 4: 38 percent / NaBH4, 20 percent NaOH / ethanol / 11 h / Heating View Scheme

1: 25 percent / powdered KOH / dimethylsulfoxide / 2 h / 25 - 30 °C 2: 1.) ZnI2, 2.) POCl3 / 1.) benzene, R.T. 8 h, 2.) pyridine, reflux 6 h. 3: 38 percent / NaBH4, 20 percent NaOH / ethanol / 11 h / Heating View Scheme

1: 1.) ZnI2, 2.) POCl3 / 1.) benzene, R.T. 8 h, 2.) pyridine, reflux 6 h. 2: 38 percent / NaBH4, 20 percent NaOH / ethanol / 11 h / Heating View Scheme

1: 83 percent / dimethylformamide / 5 h / Heating 2: 38 percent / NaBH4, 20 percent NaOH / ethanol / 11 h / Heating View Scheme