Doubly diastereoselective conjugate addition of enantiopure lithium amides to enantiopure N-enoyl oxazolidin-2-ones: a mechanistic probe
作者:Stephen G. Davies、Ai M. Fletcher、Gesine J. Hermann、Giovanna Poce、Paul M. Roberts、Andrew D. Smith、Miles J. Sweet、James E. Thomson
DOI:10.1016/j.tetasy.2010.03.033
日期:2010.7
diastereoselective conjugate addition of the antipodes of lithium N-benzyl-N-(α-methylbenzyl)amide to a range of enantiopure N-enoyl oxazolidin-2-ones has been used as a mechanistic probe to determine that the reactive conformation is the anti-s-cis form. The β-amino carbonyl products resulting from these conjugate addition reactions are useful templates for further elaboration into an α,β,α-pseudotripeptide
N-苄基-N-(α-甲基苄基)酰胺锂的对映体向非对映纯N-烯酰基恶唑烷-2-酮的双非对映选择性共轭加成已被用作机械探针来确定反应构象是抗- š -顺式形式。由这些共轭加成反应得到的β-氨基羰基产物是有用的模板,用于进一步加工成α,β,α-伪三肽。