pyridine in dichloromethane 16 h; Ambient temperature;

2,2-Dimethyl-[1,3]dioxane-4,6-dione; tris(acetonitrile)(η5-2,4-cyclopentadien-1-yl)ruthenium(1+) hexafluorophosphate(1-); (3aR,11aR,14aS,16bS)-2,2,13,13-tetra-isopropyl-3a,11a,14a,16b-tetrahydro-bis(1,3-dioxolano[4',5':3,4]pyrrolo)[1,2-a:1',2'-a]naphtho[1,2-d:8,7-d']diimidazole; toluene-4-sulfonic acid in dichloromethane T=60°C; 1 h; Inert atmosphere;