1: With tris(acetonitrile)(η5-2,4-cyclopentadien-1-yl)ruthenium(1+) hexafluorophosphate(1-) in N,N-dimethyl-formamide T=50°C; 1.5 h; Inert atmosphere; 2: With hydrogenchloride in water; N,N-dimethyl-formamide T=20°C; 1 h; Inert atmosphere;

(i) nPrMgBr, (ii) PhI(OAc)2; Multistep reaction;