Catalytic Cyclization/Silylation of Dienes Containing 1,1-Disubstituted Olefins Using Organolanthanide and Group 3 Organometallic Complexes
作者:Gary A. Molander、Eric D. Dowdy、Herbert Schumann
DOI:10.1021/jo972359k
日期:1998.5.1
The catalytic cyclization/silylation reaction of hindered dienes has been investigated using the relatively unhindered complexes Me2Si(C5H3SiMe3)(2)YCH(TMS)(2) and [Cp(2)(TMS)LnMe](2) (Ln = Y, Lu). A nide variety of dienes and trienes bearing a number of functional groups were cyclized, affording silanes containing quaternary centers in a diastereoselective fashion and in good yield. The products can be oxidized using one of several different protocols, yielding alcohols for further functionalization.