作者:Erwann Guénin、Maelle Monteil、Nadia Bouchemal、Thierry Prangé、Marc Lecouvey
DOI:10.1002/ejoc.200601067
日期:2007.7
Several synthetic pathways for obtaining phosphonic esters of the amino bisphosphonic acids (NBPs) pamidronate, alendronate and neridronate were investigated. The general guideline was to react N-protected amino acids activated as phthalimide esters or as acyl chlorides. Succinimide esters were found less reactive and quickly abandoned. gamma-Lactam formation arises when starting from Boc- or Cbz-protected
研究了获得氨基双膦酸 (NBPs) pamidronate、alendronate 和 neridronate 膦酸酯的几种合成途径。一般指导原则是将 N 保护的氨基酸作为邻苯二甲酰亚胺酯或酰氯活化。发现琥珀酰亚胺酯的反应性较低并很快被废弃。当从 Boc 或 Cbz 保护的氨基酸开始时,会形成 γ-内酰胺。邻苯二甲酰亚胺 N-保护基团允许以高产率获得这三种 NBP 的烷基或芳基单酯、二酯(对称或非对称)和三酯。((c) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)。