[Ru2(p-PriC6H4Me)2(μ-Cl)Cl]2; copper (II) acetate monohydrate in 1,1-dimethylpropan-1-ol T=100°C; 22 h; Inert atmosphere;

1: 85 percent / pyridine / tetrahydrofuran / 8 h / Ambient temperature 2: 81 percent / AlCl3 / 1,2-dichloro-ethane / 0.17 h 3: 94 percent / 1) isoamyl nitrite, trichloroacetic acid / multistep, other substituted 2,3-pyrrolinediones View Scheme

1: 98 percent / TiCl4 / CHCl3 / 96 h / Ambient temperature 2: 85 percent / pyridine / tetrahydrofuran / 8 h / Ambient temperature 3: 81 percent / AlCl3 / 1,2-dichloro-ethane / 0.17 h 4: 94 percent / 1) isoamyl nitrite, trichloroacetic acid / multistep, other substituted 2,3-pyrrolinediones View Scheme

1: 81 percent / AlCl3 / 1,2-dichloro-ethane / 0.17 h 2: 94 percent / 1) isoamyl nitrite, trichloroacetic acid / multistep, other substituted 2,3-pyrrolinediones View Scheme

isopentyl nitrite; trichloroacetic acid multistep, other substituted 2,3-pyrrolinediones; Mechanism;

in toluene 2 h; Heating;