Solvent-Free, One-Pot Synthesis of β-Lactams by the Sc(OTf)3-Catalyzed Reaction of Silyl Ketene Thiocetals with Imines
作者:Maurizio Benaglia、Franco Cozzi、Alessandra Puglisi
DOI:10.1002/ejoc.200601127
日期:2007.6
A solvent-free, catalytic, one-pot synthesis of β-lactams is described. The reaction involves the reaction between silyl ketene thioacetals derived from 2-pyridyl thioesters and imines at room temperature in the presence of catalytic amounts of Sc(OTf)3 and in the absence of solvent. Extension of this procedure to the synthesis of an enantiomerically pure azetidinone, a precursor of industrially relevant
描述了 β-内酰胺的无溶剂、催化、一锅合成。该反应涉及衍生自 2-吡啶基硫酯的甲硅烷基乙烯酮硫缩醛与亚胺在室温下在催化量的 Sc(OTf) 3 存在下且不存在溶剂的反应。还报道了该程序扩展到合成对映异构纯氮杂环丁酮,工业相关生物活性 β-内酰胺的前体。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)