作者:Sylwester Maciejewski、Irma Panfil、Czesław Bełżecki、Marek Chmielewski
DOI:10.1016/s0040-4020(01)88341-1
日期:1992.11
Conjugate addition-rearrangement of N-substituted hydroxylamines to α,β-unsaturated D-lactones provides a short and effective route to 3-substituted isoxazolidin-5-ones. These compounds were converted into 4-substituted azetidin-2-ones via a two-step procedure involving hydrogenolysis of the NO bond followed by cyclization of the resulting β-amino acids. N-Benzyl-4-(3′-acetoxy-2′-tert-butyldimeth
N-取代的羟胺与α,β-不饱和D-内酯的加成-重排提供了3-取代的异恶唑烷-5-酮的短而有效的途径。通过两步程序将这些化合物转化为4-取代的氮杂环丁烷-2-酮,该程序涉及N = O键的氢解,然后环化所得的β-氨基酸。将N-苄基-4-(3'-乙酰氧基-2'-叔丁基二甲基甲硅烷氧基丙基)氮杂环丁烷-2-酮(37)转化为已知的碳青霉烯抗生素前体。