potassium hydroxide in ethanol 2 h; Heating;

silver(l) oxide in water icebath;

1: 58 g / 2.5 h / 230 °C 2: 1.) O3, 2.) (CH3)2S / 1.) MeOH, -60 deg C, 3.5 h, 2.) MeOH, 30 deg C, 10 min 3: 85percent H3PO4 / Ambient temperature 4: 91 percent / 85percent KOH / ethanol / 2 h / Heating View Scheme

1: 85percent H3PO4 / Ambient temperature 2: 91 percent / 85percent KOH / ethanol / 2 h / Heating View Scheme

1: 1.) O3, 2.) (CH3)2S / 1.) MeOH, -60 deg C, 3.5 h, 2.) MeOH, 30 deg C, 10 min 2: 85percent H3PO4 / Ambient temperature 3: 91 percent / 85percent KOH / ethanol / 2 h / Heating View Scheme

1: 48 percent / benzoyl peroxide, N-bromosuccinimide / CCl4 / 8 h / Heating; Irradiation 2: 70 percent / 1.) hexamethylenetetramine / 1.) CHCl3, reflux, 4 h; 2.) H2O, AcOH, reflux, 3 h 3: 77 percent / silver oxide / H2O / icebath View Scheme

1: 70 percent / 1.) hexamethylenetetramine / 1.) CHCl3, reflux, 4 h; 2.) H2O, AcOH, reflux, 3 h 2: 77 percent / silver oxide / H2O / icebath View Scheme

1: 90 percent / phosphorus pentaoxide, phosphoric acid / chlorobenzene / 1 h / 125 - 130 °C 2: 48 percent / benzoyl peroxide, N-bromosuccinimide / CCl4 / 8 h / Heating; Irradiation 3: 70 percent / 1.) hexamethylenetetramine / 1.) CHCl3, reflux, 4 h; 2.) H2O, AcOH, reflux, 3 h 4: 77 percent / silver oxide / H2O / icebath View Scheme

1: 62 percent / sodium ethoxide / 20 h / Heating 2: 90 percent / phosphorus pentaoxide, phosphoric acid / chlorobenzene / 1 h / 125 - 130 °C 3: 48 percent / benzoyl peroxide, N-bromosuccinimide / CCl4 / 8 h / Heating; Irradiation 4: 70 percent / 1.) hexamethylenetetramine / 1.) CHCl3, reflux, 4 h; 2.) H2O, AcOH, reflux, 3 h 5: 77 percent / silver oxide / H2O / icebath View Scheme

1: SOCl2 / toluene / 3 h / Heating 3: 64 percent / 2,3-dichlor-5,6-dicyano-1,4-benzochinon / 4 h / Heating 4: 90 percent / KOH / methanol; H2O / 3 h / Heating View Scheme