1: 3,8-dimethylacenaphthylene-1,2-dione; pentan-3-one With potassium hydroxide in methanol T=20°C; 1 h; 2: bicyclo[2.2.1]hepta-2,5-diene With acetic anhydride T=140°C; 120 h; Further stages.;

1: 3,8-dimethylacenaphthylene-1,2-dione With potassium hydroxide; pentan-3-one in methanol 1 h; 2: bicyclo[2.2.1]hepta-2,5-diene With acetic anhydride in methanol T=140°C; 96 h;

1: potassium hydroxide / methanol / 2 h / 18 - 25 °C / Large scale reaction 2: acetic anhydride / 135 - 140 °C / Large scale reaction View Scheme

1: potassium hydroxide / methanol / 2 h / 18 - 25 °C / Large scale reaction 2: acetic anhydride / 135 - 140 °C / Large scale reaction 3: N-bromosuccinmide; 2,2'-azo-bisisobutyronitrile / chlorobenzene / 70 - 95 °C / 300.03 Torr / Irradiation; Large scale reaction 4: sodium hydroxide / water; isopropyl alcohol / 77 - 82 °C / Large scale reaction 5: 5 Pd(II)/C(eggshell); formic acid; 3-Methylpyridine; triethylamine / water / 16 h / Reflux; Large scale reaction View Scheme