201230-52-6Relevant academic research and scientific papers
Enantiomerically pure zirconium and hafnium complexes containing a chiral cyclopentadiene derivative prepared from (-)-β-pinene
Rousset, Christophe J.,Iyer, Suresh,Negishi, Ei-Ichi
, p. 3921 - 3926 (1997)
Chirally homogeneous (1S,8R)-3,5,9,9-tetramethyltricyclo[6.1.1.02,6] deca-2,5-diene 1 has been prepared in five steps and 42% overall yield from (-)-β-pinene; its successive treatment first with n-BuLi and then with ZrCl4 or HfCl4 provides, in high yields with high π-facial selectivity, the corresponding dichlorobis{η5-(1S,8R)-3,5,9,9-tetramethyltricyclo [6.1.1.02,6]deca-3,5-dien-2-yl}zirconium or hafnium, respectively.
