resulting stereochemically complex spiro[pyrrolidin‐3,3′‐oxindole]s core with Fmoc‐L‐pro‐Cl and spontaneous ring closure upon N‐deprotection were obtained. The synthesized compounds 13a–e and 15a–e were evaluated for their antibacterial activities. The result showed that compounds 13b and 15b were active only against Gram‐positive bacteria, and selective antibacterial activity was exhibited by compounds 13d
基于螺环
前列腺素A结构,设计并合成了一系列螺-
吲哚基二酮
哌嗪结构类别的化合物,这些化合物包含具有全碳四元立体中心的羟
吲哚。可以通过七步反应序列有效地获得总合成物,其市售材料的总收率可达18-28%,并具有高度对映选择性的1,3-偶极环加成反应,生成的立体
化学复杂的螺[pyrrolidin-3] N酰化获得了带有Fmoc - L - pro -Cl的N,3'-氧
吲哚核,并在N-脱保护时自发地闭环。合成的化合物13a–e和15a–e对它们的抗菌活性进行了评估。结果表明,化合物13b和15b仅对革兰氏阳性细菌具有活性,化合物13d和13e对
乳酸链球菌具有选择性的抗菌活性。此外,所有剩余的化合物都显示出一定程度的抗菌活性。此外,还讨论了结构-活性关系。