potassium carbonate in 1,4-dioxane T=110°C;

1: 55 percent / poly(phosphoric)acid / 3 h / Ambient temperature 2: 90 percent / 85percent hydrazine hydrate / ethanol / 14 h / Heating 3: 44 percent / HgO, Na2SO4, 10percent KOH / tetrahydrofuran; ethanol / 12 h / Ambient temperature 4: benzene / 2 h / Irradiation View Scheme

1: 93 percent / SOCl2 3: 76 percent / SOCl2 4: 79 percent / Mg / 1.) THF, 12 h, 2.) THF, reflux, 12 h 5: 1.) MeI, 2.) 20percent NaOH / 1.) RT, 3 h, 2.) MeOH, water, reflux, 24 h 6: 55 percent / poly(phosphoric)acid / 3 h / Ambient temperature 7: 90 percent / 85percent hydrazine hydrate / ethanol / 14 h / Heating 8: 44 percent / HgO, Na2SO4, 10percent KOH / tetrahydrofuran; ethanol / 12 h / Ambient temperature 9: benzene / 2 h / Irradiation View Scheme

2: 76 percent / SOCl2 3: 79 percent / Mg / 1.) THF, 12 h, 2.) THF, reflux, 12 h 4: 1.) MeI, 2.) 20percent NaOH / 1.) RT, 3 h, 2.) MeOH, water, reflux, 24 h 5: 55 percent / poly(phosphoric)acid / 3 h / Ambient temperature 6: 90 percent / 85percent hydrazine hydrate / ethanol / 14 h / Heating 7: 44 percent / HgO, Na2SO4, 10percent KOH / tetrahydrofuran; ethanol / 12 h / Ambient temperature 8: benzene / 2 h / Irradiation View Scheme

1: 90 percent / 85percent hydrazine hydrate / ethanol / 14 h / Heating 2: 44 percent / HgO, Na2SO4, 10percent KOH / tetrahydrofuran; ethanol / 12 h / Ambient temperature 3: benzene / 2 h / Irradiation View Scheme

1: 44 percent / HgO, Na2SO4, 10percent KOH / tetrahydrofuran; ethanol / 12 h / Ambient temperature 2: benzene / 2 h / Irradiation View Scheme

pentacarbonyl(η2-cis-cyclooctene)chromium(0) in dichloromethane 16 h; Ambient temperature;

Irradiation;

in benzene 2 h; Irradiation;

in benzene Ambient temperaturereaction with radical; MechanismRate constant;