Tetramate derivatives by chemoselective Dieckmann ring closure of<i>allo</i>-phenylserines, and their antibacterial activity
作者:Liban Saney、Kirsten E. Christensen、Miroslav Genov、Alexander Pretsch、Dagmar Pretsch、Mark G. Moloney
DOI:10.1039/d3ob00376k
日期:——
showing the importance of steric bulk around the bicyclic ring system. The derived C7-carboxamidotetramates, but not C7-acyl systems, exhibited potent antibacterial activity against MRSA, with the most active compounds exhibiting well-defined physicochemical and structure–activity properties. This work clearly demonstrates that densely functionalised tetramates are both readily available and may exhibit
报道了一种通用途径,该途径利用衍生自别苯丝氨酸的恶唑烷衍生物的 Dieckmann 环化作用,可直接获得取代的双环四酸酯。有趣的是观察到恶唑烷的N-酰化反应的高水平非对映选择性及其在 Dieckmann 环化中闭环的完全化学选择性。重要的是,化学选择性的意义与早先报道的threo不同-苯丝氨酸系统,显示了双环系统周围空间体积的重要性。衍生的 C7-甲酰胺四甲酸酯,但不是 C7-酰基系统,对 MRSA 表现出强大的抗菌活性,其中最活跃的化合物表现出明确的物理化学和结构-活性特性。这项工作清楚地表明,密集功能化的四聚体既容易获得,又可能表现出高水平的抗菌活性。