Synthesis of Novel Bis(β-lactam)-1,3-diynes by Copper-Promoted Homo- or Cross-Coupling of Alkynyl-2-azetidinones
作者:Benito Alcaide、Pedro Almendros、Rocío Carrascosa、Raquel Rodríguez-Acebes
DOI:10.1002/ejoc.200701083
日期:2008.3
of various (β-lactam)acetylenes to afford C2-symmetrical bis(β-lactam)-1,3-diynes, whereas these 2-azetidinone-tethered alkynes underwent the Cadiot–Chodkiewicz cross-coupling reaction with different 2-azetidinone bromoalkynes to form a variety of unsymmetrical bis(β-lactam)diynes in good yields. In addition to their potential biological activity, the resulting enantiopure bis(β-lactam)-1,3-diynes
Cu(OAc)2 与 K2CO3(一种固体碱而不是胺)的组合被证明是一种非常有效的系统,可促进各种(β-内酰胺)乙炔的均偶联,以提供 C2-对称双(β-内酰胺)- 1,3-二炔,而这些 2-氮杂环丁酮系链炔与不同的 2-氮杂环丁酮溴炔发生 Cadiot-Chodkiewicz 交叉偶联反应,以良好的产率形成各种不对称的双(β-内酰胺)二炔。除了潜在的生物活性外,所得的对映体纯双(β-内酰胺)-1,3-二炔还可转化为双(β-氨基酯)-1,3-二炔,可用作大环腔,如以及手性配体。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)