摘要:
Ru(II)-catalyzed cross-metathesis of 1,1'-diallyl-nickelocene (1) with methyl vinyl ketone or methyl acrylate afforded in high yields 1,1'-bis(4-oxo-2-pentenyl)nickelocene (3) or 1,1'-bis(4-methoxy-4-oxo-2-butenyl)nickelocene (4), respectively. Compound 3 crystallizes in the monoclinic crystal system, space group P2(1)/c, in a staggered conformation with the alpha,beta-unsaturated moiety perpendicular to the cyclopentadienyl plane.