Michael addition of nitroalkanes to nonactivated α,β-unsaturated δ-thiolactams: reactivity, diastereoselectivity, and comparison to α,β-unsaturated δ-lactams
作者:Jacek G. Sośnicki
DOI:10.1016/j.tet.2008.12.037
日期:2009.2
Aliphatic nitrocompounds add to nonactivated α,β-unsaturated δ-thiolactams leading to 4-nitroalkyl functionalized δ-thiolactams in good yields. The addition is a stereocontrolled process with respect to substituents at C-6, and takes place producing trans 4,6-disubstituted adducts in most cases. Ease of the addition has been studied in relation to the structure of the δ-thiolactam acceptors, within
脂肪族硝基化合物会添加到未活化的α,β-不饱和δ-硫代内酰胺中,从而以高收率得到4-硝基烷基官能化的δ-硫代内酰胺。对于C-6处的取代基,该加成是立体控制的方法,并且在大多数情况下进行以产生反式4,6-二取代的加合物。在FMO理论中,已经研究了与δ-硫代内酰胺受体的结构有关的添加简易性。与类似的δ-内酰胺的比较研究表明,在迈克尔加成反应中,α,β-不饱和的δ-硫代内酰胺具有优势,并表明这些化合物在4-官能化哌啶衍生物的合成中具有很高的前景。