Highly efficient macrolactonization of ω-hydroxy acids using benzotriazole esters: synthesis of Sansalvamide A
作者:José Antonio Morales-Serna、Ericka Sánchez、Ricardo Velázquez、Jorge Bernal、Eréndira García-Ríos、Rubén Gaviño、Guillermo Negrón-Silva、Jorge Cárdenas
DOI:10.1039/c0ob00161a
日期:——
A facile and mild macrolactonization reaction of ω-hydroxy acids was developed based on the transesterification of benzotriazole esters. Treatment of ω-hydroxy acids with 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC) and 1-hydroxy benzotriazole (HOBT) in chloroform provided macrolactones in excellent yields. The reactions were performed under basic, neutral and acidic conditions using N,N-d
在ω-羟基酸酯交换的基础上,进行了轻度和温和的ω-羟基酸大内酯化反应。 苯并三唑酯。ω-羟基酸的处理1-乙基-3-(3-二甲基氨基丙基)碳二亚胺 (EDC)和 1-羟基苯并三唑 (霍比特) 在 氯仿提供了优良的大内酯。反应在碱性,中性和酸性条件下使用N,N-二甲基氨基吡啶 (地图), 四丁基四氟硼酸铵(TBABF 4)和BF 3 ·的Et 2 O,分别。煅烧水滑石 也被用来代替 地图。最后,为了测试该方案在生物相关大内酯的合成,总合成中的应用范围。山沙酰胺A 进行了。