Overturning Indolyne Regioselectivities and Synthesis of Indolactam V
摘要:
We report the design and synthesis of an indolyne that displays a reversal in regioselectivity, in both nucleophilic addition and cycloaddition reactions, compared to typical 4,5-indolynes. Our approach utilizes simple computations to predict regioselectivity in reactions of unsymmetrical arynes. With this methodology, novel benzenoid-substituted indoles can be accessed with significant regiocontrol. Furthermore, the technology provides an unconventional tactic for the synthesis of C4-substituted indole alkaloids, as demonstrated by a synthesis of indolactam V.
Overturning Indolyne Regioselectivities and Synthesis of Indolactam V
摘要:
We report the design and synthesis of an indolyne that displays a reversal in regioselectivity, in both nucleophilic addition and cycloaddition reactions, compared to typical 4,5-indolynes. Our approach utilizes simple computations to predict regioselectivity in reactions of unsymmetrical arynes. With this methodology, novel benzenoid-substituted indoles can be accessed with significant regiocontrol. Furthermore, the technology provides an unconventional tactic for the synthesis of C4-substituted indole alkaloids, as demonstrated by a synthesis of indolactam V.
Total syntheses of indolactam alkaloids (−)-indolactam V, (−)-pendolmycin, (−)-lyngbyatoxin A, and (−)-teleocidin A-2
作者:Noah F. Fine Nathel、Tejas K. Shah、Sarah M. Bronner、Neil K. Garg
DOI:10.1039/c4sc00256c
日期:——
nine-membered ring. The totalsynthesis of indolactam V then sets the stage for the divergent synthesis of the other targeted alkaloids. Specifically, late-stage sp2–sp3 cross-couplings on an indolactam V derivative are used to introduce the key C7 substituents and the necessary quaternary carbons. These challenging couplings, in addition to other delicate manipulations, all proceed in the presence of a basic tertiary
我们报告了 (-)-吲哚内酰胺 V 和 C7 取代的吲哚内酰胺生物碱 (-)-pendolmycin、(-)-lyngbyatoxin A 和 (-)-teleocidin A-2 的全合成。制备吲哚内酰胺 V 的策略依赖于变形控制的吲哚炔官能化反应来建立 C4-N 键,此外还需要添加分子内共轭物来构建构象灵活的九元环。然后,吲哚内酰胺 V 的全合成为其他目标生物碱的不同合成奠定了基础。具体来说,后期 sp 2 –sp 3吲哚内酰胺 V 衍生物上的交叉偶联用于引入关键的 C7 取代基和必要的季碳。除了其他微妙的操作外,这些具有挑战性的偶联都在碱性叔胺、未受保护的仲酰胺和未受保护的吲哚存在下进行。因此,我们的方法不仅能够实现四种吲哚内酰胺生物碱的对映特异性全合成,而且还可以作为探索生物碱全合成背景下产生复杂性和化学选择性转化的平台。
[EN] COMPOUNDS AND METHODS FOR MODULATING RNA FUNCTION<br/>[FR] COMPOSÉS ET MÉTHODES PERMETTANT DE MODULER LA FONCTION DE L'ARN
申请人:ARRAKIS THERAPEUTICS INC
公开号:WO2018006074A3
公开(公告)日:2018-02-15
Overturning Indolyne Regioselectivities and Synthesis of Indolactam V
作者:Sarah M. Bronner、Adam E. Goetz、Neil K. Garg
DOI:10.1021/ja200437g
日期:2011.3.23
We report the design and synthesis of an indolyne that displays a reversal in regioselectivity, in both nucleophilic addition and cycloaddition reactions, compared to typical 4,5-indolynes. Our approach utilizes simple computations to predict regioselectivity in reactions of unsymmetrical arynes. With this methodology, novel benzenoid-substituted indoles can be accessed with significant regiocontrol. Furthermore, the technology provides an unconventional tactic for the synthesis of C4-substituted indole alkaloids, as demonstrated by a synthesis of indolactam V.