1: 74 percent / PPA 2: 78.4 percent / H2 View Scheme

oxygen; methylene blue in ethanol Irradiation;

1: (i) Al(OiPr)3, iPrOH, (ii) (heating), Al2O3, Py 2: O2, methylene blue / aq. ethanol / Irradiation View Scheme

1: (i) Br2, NaOAc, (ii) LiBr, Li2CO3 2: (i) Al(OiPr)3, iPrOH, (ii) (heating), Al2O3, Py 3: O2, methylene blue / aq. ethanol / Irradiation View Scheme

1: Br2 2: (i) Br2, NaOAc, (ii) LiBr, Li2CO3 3: (i) Al(OiPr)3, iPrOH, (ii) (heating), Al2O3, Py 4: O2, methylene blue / aq. ethanol / Irradiation View Scheme

sulfur; pyrite in decalin T=300°C; P=75005.9 Torr; 1 h; catalytic effects of Fe and FeS2, additive effect of sulfur; Product distribution;

phosphorus pentoxide T=160 - 200°C;

1: LDA / tetrahydrofuran; hexane / 1.) -78 deg C, 10 min, 2.) -78 deg C, 1 h; -78 deg C to r.t. 2: (COCl)2, DMF / benzene / 3 h / Ambient temperature 3: 1.) Na / 1.) THF, 2.) 10 min 4: 91 percent / Bu3SnH, AIBN / benzene / 2 h / Heating 5: ethyl acetate / 18 h / Ambient temperature 6: dimethyldioxirane / CH2Cl2 / -78 °C 7: Et3N / CH2Cl2 / 18 h / Ambient temperature 8: 1.) Zn, TiCl4 / 1.) THF, r.t., 30 min; CH2Cl2, r.t., 30 min, 2.) 15 min 9: 88 percent / aq. K2CO3 / methanol / 18 h / Heating 10: (COCl)2, DMF / CH2Cl2 / 2 h 11: DMAP / benzene / 0.5 h / Heating 12: benzene / 1 h / Heating; Irradiation View Scheme

1: aq. HCl / 48 h / Heating 2: Heating 3: LDA / tetrahydrofuran; hexane / 1.) -78 deg C, 10 min, 2.) -78 deg C, 1 h; -78 deg C to r.t. 4: (COCl)2, DMF / benzene / 3 h / Ambient temperature 5: 1.) Na / 1.) THF, 2.) 10 min 6: 91 percent / Bu3SnH, AIBN / benzene / 2 h / Heating 7: ethyl acetate / 18 h / Ambient temperature 8: dimethyldioxirane / CH2Cl2 / -78 °C 9: Et3N / CH2Cl2 / 18 h / Ambient temperature 10: 1.) Zn, TiCl4 / 1.) THF, r.t., 30 min; CH2Cl2, r.t., 30 min, 2.) 15 min 11: 88 percent / aq. K2CO3 / methanol / 18 h / Heating 12: (COCl)2, DMF / CH2Cl2 / 2 h 13: DMAP / benzene / 0.5 h / Heating 14: benzene / 1 h / Heating; Irradiation View Scheme

1: (COCl)2, DMF / benzene / 3 h / Ambient temperature 2: 1.) Na / 1.) THF, 2.) 10 min 3: 91 percent / Bu3SnH, AIBN / benzene / 2 h / Heating 4: ethyl acetate / 18 h / Ambient temperature 5: dimethyldioxirane / CH2Cl2 / -78 °C 6: Et3N / CH2Cl2 / 18 h / Ambient temperature 7: 1.) Zn, TiCl4 / 1.) THF, r.t., 30 min; CH2Cl2, r.t., 30 min, 2.) 15 min 8: 88 percent / aq. K2CO3 / methanol / 18 h / Heating 9: (COCl)2, DMF / CH2Cl2 / 2 h 10: DMAP / benzene / 0.5 h / Heating 11: benzene / 1 h / Heating; Irradiation View Scheme