水浒生物碱有趣的结构复杂性和生物活性长期以来一直备受关注。在此,我们报告了水蚤生物碱 dapholdhamine B 及其内酯衍生物的首次和对映选择性全合成。dapholdhamine B 的化学结构包含一个独特的氮杂金刚烷核心骨架和八个连续的立体中心,包括三个连续的完全取代的立体中心,这给合成带来了巨大的挑战。这种用于实现氮杂金刚烷天然产物首次合成的简洁方法具有乙烯基曼尼希反应、优化的 α-溴-α,β-不饱和酮合成、底物依赖性分子内氮杂-迈克尔加成、关键环化通过酰胺活化,SN2'-型内酯化,
水浒生物碱有趣的结构复杂性和生物活性长期以来一直备受关注。在此,我们报告了水蚤生物碱 dapholdhamine B 及其内酯衍生物的首次和对映选择性全合成。dapholdhamine B 的化学结构包含一个独特的氮杂金刚烷核心骨架和八个连续的立体中心,包括三个连续的完全取代的立体中心,这给合成带来了巨大的挑战。这种用于实现氮杂金刚烷天然产物首次合成的简洁方法具有乙烯基曼尼希反应、优化的 α-溴-α,β-不饱和酮合成、底物依赖性分子内氮杂-迈克尔加成、关键环化通过酰胺活化,SN2'-型内酯化,
Synthesis of <i>N</i>-Fused Polycyclic Indoles via Ligand-Free Palladium-Catalyzed Annulation/Acyl Migration Reaction
作者:Zhan Dong、Xiao-Wen Zhang、Weishuang Li、Zi-Meng Li、Wen-Yan Wang、Yan Zhang、Wei Liu、Wen-Bo Liu
DOI:10.1021/acs.orglett.8b04128
日期:2019.2.15
An efficient synthesis of N-fused polycyclic indoles by a palladium-catalyzed annulation/acylmigration cascade reaction is described. The reaction is ligand-free, scalable, and provides access to a diverse range of useful indole scaffolds from readily available starting materials. Supporting mechanistic studies indicate that the reaction likely proceeds via an intramolecular α-arylation mechanism
A Fischer Indolization Strategy toward the Total Synthesis of (–)-Goniomitine
作者:Brian M. Stoltz、Beau P. Pritchett、Jun Kikuchi、Yoshitaka Numajiri
DOI:10.3987/com-16-s(s)80
日期:——
A Fischer indolization strategy toward the core of (-)-goniomitine is reported. Initial investigations into the Pd-catalyzed asymmetric allylic alkylation of dihydropyrido[1,2-a]indolone (DHPI) substrates are also discussed.
Synthesis of 7-Substituted Benzolactam-V8s and Their Selectivity for Protein Kinase C Isozymes
作者:Dawei Ma、Guozhi Tang、Alan P. Kozikowski
DOI:10.1021/ol026125l
日期:2002.7.1
[GRAPHICS]Condensation Of L-valine benzyl ester toluenesulfonic acid salt with a substituted cyclohexadione followed by aromatization with the assistance of NBS provides an N-aryl L-valine benzyl ester. This intermediate is converted into 7-substituted benzolactam-V8s using an asymmetric Strecker reaction as the key step. The target molecules show a different pattern of isozyme selectivity relative to the 8-substituted benzolactam-V8s.