Dramatic effect of substituents and TMEDA additive on the regioselectivity of directed orthometalation of tetrasubstituted aromatics
作者:M. Khaldi、F. Chrétien、Y. Chapleur
DOI:10.1016/0040-4039(94)85064-x
日期:1994.1
The regioselectivity of the directed orthometalation of terrasubstituted aromatic N,N-diethylamides was found to depend of the ring substituents and of the base used A dramatic effect of the additive TMEDA to s-butyllithium has been observed which could be explained in terms of steric bulk.