Modular Synthesis of Chiral N-Protected β-Seleno Amines and Amides via Cleavage of 2-Oxazolidinones and Application in Palladium-Catalyzed Asymmetric Allylic Alkylation
作者:Antonio Braga、Jasquer Sehnem、Fabrício Vargas、Priscila Milani、Vanessa Nascimento
DOI:10.1055/s-2008-1042938
日期:2008.4
A set of chiral β-seleno amines have been efficiently synthesized via the ring-opening reaction of chiral N-acyl oxazolidin-ones by selenium nucleophiles. These compounds could be transformed into β-seleno amides by reaction with acid chlorides. The present method is applicable to the synthesis of β-chalcogeno amides containing selenium, sulfur and tellurium atoms in good yields. Additionally, these
硒亲核试剂通过手性N-酰基恶唑烷酮的开环反应有效合成了一组手性β-硒胺。这些化合物可以通过与酰氯反应转化为β-硒代酰胺。本方法适用于以良好收率合成含硒、硫和碲原子的β-硫族酰胺。此外,这些新化合物在钯催化的不对称烯丙基烷基化反应中作为配体进行了评估,得到了高达 98% ee 的相应烷基化产物。