Synthesis of a β-diketone from a dithioacetal. A model study for the synthesis of an ionomycin fragment
作者:Kevin P. Shelly、Larry Weiler
DOI:10.1139/v88-220
日期:1988.6.1
The anions of dithioacetals react with epoxides to give β-hydroxydithioketals, which can be oxidized and hydrolyzed to β-diketones. This sequence is applied to a model study of the synthesis of the C-5 to C-15 fragment of the antibiotic ionomycin.
Fully Reagent-Controlled Asymmetric Synthesis of (−)-Spongidepsin via the Zr-Catalyzed Asymmetric Carboalumination of Alkenes (ZACA Reaction)
作者:Gangguo Zhu、Ei-ichi Negishi
DOI:10.1021/ol0707259
日期:2007.7.1
The ZACAreaction has been shown to proceed satisfactorily with internally OH-substituted 1-alkenes, provided that the OH group is unprotected and non-allylic. This reaction was used for reagent-controlled asymmetric construction of 3. Allylic alcohol was converted to 2 in seven steps via iterative ZACA processes and simple chromatography. (-)-Spongidepsin (1) was synthesized by using 2 and 3 through