posted on 2008-03-06, 00:00authored byPhilippe Bertus, Christine Menant, Chloé Tanguy, Jan Szymoniak
It has been shown that diene−titanium complexes exhibit substrate-dependent 1,2- or 1,4-dicarbanion reactivity. On this basis, 3-cyclopentenylamines and spiro-vinylcyclopropane lactams were easily prepared by using homoallylic Grignard reagents, Ti(O-i-Pr)4, and nitriles or
cyanoesters, respectively.