On the origins of diastereoselectivity in the conjugate additions of the antipodes of lithium N-benzyl-(N-α-methylbenzyl)amide to enantiopure cis- and trans-dioxolane containing α,β-unsaturated esters
作者:Stephen G. Davies、Emma M. Foster、Aileen B. Frost、James A. Lee、Paul M. Roberts、James E. Thomson
DOI:10.1039/c2ob25099c
日期:——
“Matching” and “mismatching” effects in the doubly diastereoselectiveconjugateadditions of the antipodes of lithium N-benzyl-(N-α-methylbenzyl)amide to enantiopure cis- and trans-dioxolane containing α,β-unsaturatedesters have been investigated. High levels of substrate control were established first upon conjugateaddition of achiral lithium N-benzyl-N-isopropylamide to both tert-butyl (S,S,E)-4