carbon monoxide in diethyl ether P=4654.3 Torr; 48 h; Irradiation; Yield given;

1: 99 percent 2: 100 percent / H2 / Pd/C / ethyl acetate View Scheme

T=130°C; Cycloaddition; Further byproducts given;

iodine; magnesium; hydroquinone 1.) 155-160 deg C, 4 h, 2.) Et2O, reflux, 3 h; Yield given. Multistep reaction. Yields of byproduct given. Title compound not separated from byproducts;

in toluene 0.25 h; Heating;

Irradiation;

T=170 - 180°C;

unter Druck;

1: singlet oxygen / 0 °C / temperature must not exceed 0 deg C 2: 83 percent / tetrahydrofuran / 0.5 h / -78 - 0 °C 3: 90 percent / xylene / Heating View Scheme

1: 53 percent / oxygen, thiourea, rose bengal / methanol / Irradiation; 1.) 3 h; 2.) in the dark without oxygen, 16 h 2: 96.4 percent / 4-(dimethylamino)pyridine / CH2Cl2; pyridine / 1.) 0 deg C,; 2.) room temperature 13 h 3: 89.5 percent / osmium tetraoxide, trimethylamine N-oxide dihydrate / tetrahydrofuran; acetone; H2O / 15 h / Ambient temperature 4: 99 percent / p-toluenesulfonic acid hydrate / 60 h 5: 99 percent / KOH / methanol / 0.5 h 6: 88 percent / trifluoroacetic acid, 1,3-dicyclohexylcarbodiimide / benzene; pyridine; dimethylsulfoxide / 18 h 7: 1.) n-BuLi; 2.) CuI-Bu3P, and Bu3P / 1.) THF, -78 deg C, 20 min, 30 min; 2.) THF, ether, -78 deg C 10 min, - 30 deg C 1 h; 3.) THF, ether, HMPA, -30 deg C, 3 h 8: 78 percent / pyridine, 50percent aq. HF / 1.) 0 deg C, 30 min; 2.) rt, 4.5 h 9: aluminum amalgam / tetrahydrofuran; H2O / addition in equal portion after 10 h, 17 h and 23h; rt 15 h View Scheme