Synthesis of the C8–C16 fragment of amphidinolide R
摘要:
An asymmetric synthesis of the C8-C16 fragment with several stereogenic centers of amphidinolide R, is described. The key reaction, Sharpless asymmetric epoxidation has provided the basis for generation of the required stereocenters. The target fragment was accomplished in a convergent manner in nine steps (longest linear synthesis of the sequence) and 32% overall yield was obtained starting from 2-butene-1,4-diol. (C) 2014 Elsevier Ltd. All rights reserved.
Synthesis of the C8–C16 fragment of amphidinolide R
摘要:
An asymmetric synthesis of the C8-C16 fragment with several stereogenic centers of amphidinolide R, is described. The key reaction, Sharpless asymmetric epoxidation has provided the basis for generation of the required stereocenters. The target fragment was accomplished in a convergent manner in nine steps (longest linear synthesis of the sequence) and 32% overall yield was obtained starting from 2-butene-1,4-diol. (C) 2014 Elsevier Ltd. All rights reserved.
Synthesis of a 35-Member Stereoisomer Library of Bistramide A: Evaluation of Effects on actin State, Cell Cycle and Tumor Cell Growth
作者:Iwona E. Wrona、Jason T. Lowe、Thomas J. Turbyville、Tanya R. Johnson、Julien Beignet、John A. Beutler、James S. Panek
DOI:10.1021/jo802269q
日期:2009.3.6
Synthesis and preliminary biological evaluation of a 35-member library of bistramide A stereoisomers are reported. All eight stereoisomers of the C1−C13 tetrahydropyran fragment of the molecule were prepared utilizing crotylsilane reagents 9 and 10 in our [4+2]-annulation methodology. In addition, the four isomers of the C14−C18 γ-amino acid unit were accessed via a Lewis acid mediated crotylation
报道了双酰胺 A 立体异构体的 35 成员文库的合成和初步生物学评估。在我们的 [4+2] 环化方法中,使用巴豆基硅烷试剂9和10制备了该分子的 C1-C13 四氢吡喃片段的所有八种立体异构体。此外,C14-C18 γ-氨基酸单元的四种异构体通过路易斯酸介导的巴豆化反应使用有机硅烷11的两种对映异构体获得. Bistramide A 的螺旋缩酮亚基在 C39 醇处进行了修饰,以提供立体化学多样化的另一个点。通过使用标准肽偶联方案将片段偶联以提供天然产物的 35 种立体异构体。筛选这些立体化学类似物对细胞肌动蛋白的影响和对癌细胞系(UO-31 肾和 SF-295 CNS)的细胞毒性。这些测定的结果鉴定了一种类似物1.21,其相对于天然产物 bistramide A 具有增强的效力。
Total Synthesis of Bistramide A
作者:Jason T. Lowe、Iwona E. Wrona、James S. Panek
DOI:10.1021/ol062957y
日期:2007.1.1
An asymmetricsynthesis of the marinemetabolitebistramide A is reported. The synthesis relies on the utility of three different organosilane reagents to construct all principle fragments and 8 of the 11 stereogenic centers of the natural product. [structure: see text].
An asymmetric synthesis of the C8-C16 fragment with several stereogenic centers of amphidinolide R, is described. The key reaction, Sharpless asymmetric epoxidation has provided the basis for generation of the required stereocenters. The target fragment was accomplished in a convergent manner in nine steps (longest linear synthesis of the sequence) and 32% overall yield was obtained starting from 2-butene-1,4-diol. (C) 2014 Elsevier Ltd. All rights reserved.