n-butyllithium in tetrahydrofuran; hexane T=-78°C; 1 h;

2: 87 percent / N-bromosuccinimide / benzoyl peroxide / CCl4 / 3 h / Heating 3: 1.) thiourea; 2.) 6percent NaOH / 1.) aq. ethanol, reflux, 13 h.; 2.) water, reflux, 8 h. 4: 56 percent / cesium carbonate / dimethylformamide / 8 h / Heating 5: 98 percent / CH2Cl2 / 24 h / Ambient temperature 7: 42 percent / iodine / cyclohexane / 2 h / Irradiation 8: 13 percent / n-butyllithium / hexane; tetrahydrofuran / 1 h / -78 °C View Scheme

1: 87 percent / N-bromosuccinimide / benzoyl peroxide / CCl4 / 3 h / Heating 2: 1.) thiourea; 2.) 6percent NaOH / 1.) aq. ethanol, reflux, 13 h.; 2.) water, reflux, 8 h. 3: 56 percent / cesium carbonate / dimethylformamide / 8 h / Heating 4: 98 percent / CH2Cl2 / 24 h / Ambient temperature 6: 42 percent / iodine / cyclohexane / 2 h / Irradiation 7: 13 percent / n-butyllithium / hexane; tetrahydrofuran / 1 h / -78 °C View Scheme

1: 70 percent / cc. HCl, tin powder / toluene / 5 h / Heating 3: 87 percent / N-bromosuccinimide / benzoyl peroxide / CCl4 / 3 h / Heating 4: 1.) thiourea; 2.) 6percent NaOH / 1.) aq. ethanol, reflux, 13 h.; 2.) water, reflux, 8 h. 5: 56 percent / cesium carbonate / dimethylformamide / 8 h / Heating 6: 98 percent / CH2Cl2 / 24 h / Ambient temperature 8: 42 percent / iodine / cyclohexane / 2 h / Irradiation 9: 13 percent / n-butyllithium / hexane; tetrahydrofuran / 1 h / -78 °C View Scheme

1: 56 percent / cesium carbonate / dimethylformamide / 8 h / Heating 2: 98 percent / CH2Cl2 / 24 h / Ambient temperature 4: 42 percent / iodine / cyclohexane / 2 h / Irradiation 5: 13 percent / n-butyllithium / hexane; tetrahydrofuran / 1 h / -78 °C View Scheme

1: 1.) thiourea; 2.) 6percent NaOH / 1.) aq. ethanol, reflux, 13 h.; 2.) water, reflux, 8 h. 2: 56 percent / cesium carbonate / dimethylformamide / 8 h / Heating 3: 98 percent / CH2Cl2 / 24 h / Ambient temperature 5: 42 percent / iodine / cyclohexane / 2 h / Irradiation 6: 13 percent / n-butyllithium / hexane; tetrahydrofuran / 1 h / -78 °C View Scheme

1: 42 percent / iodine / cyclohexane / 2 h / Irradiation 2: 13 percent / n-butyllithium / hexane; tetrahydrofuran / 1 h / -78 °C View Scheme

1: 98 percent / CH2Cl2 / 24 h / Ambient temperature 3: 42 percent / iodine / cyclohexane / 2 h / Irradiation 4: 13 percent / n-butyllithium / hexane; tetrahydrofuran / 1 h / -78 °C View Scheme

2: 42 percent / iodine / cyclohexane / 2 h / Irradiation 3: 13 percent / n-butyllithium / hexane; tetrahydrofuran / 1 h / -78 °C View Scheme

iodine Irradiation;