DNA 编码文库技术在早期药物发现中的作用日益增强,这表明对治疗相关杂环化合物的 DNA 兼容合成方法的巨大需求。在此,我们报道了通过 Sonogashira 偶联和分子内闭环的级联反应首次在 DNA 上合成多取代吲哚。通过铃木偶联在第三位进行的进一步功能化利用了多样化的化学空间。该方法的高保真度还使得能够构建基于吲哚的模拟库。
Palladium-Catalyzed Ligand-Free Double Cyclization Reactions for the Synthesis of 3-(1′-Indolyl)-phthalides
作者:Shuo Yuan、Dan-Qing Zhang、Jing-Ya Zhang、Bin Yu、Hong-Min Liu
DOI:10.1021/acs.orglett.9b04241
日期:2020.2.7
heterocyclic scaffolds in numerous natural products and bioactive molecules. The synthesis and biological evaluation of the compounds combining these two scaffolds have rarely been reported. Herein, we repot the first palladium-catalyzed ligand-free double cyclization reactions that enable efficient synthesis of 3-(1'-indolyl)-phthalides (42 examples, up to 96% yield) under mild conditions. Notably
Palladium-catalyzed <i>C</i>-glycosylation and annulation of <i>o</i>-alkynylanilines with 1-iodoglycals: convenient access to 3-indolyl-<i>C</i>-glycosides
作者:Jianchao Liu、Xiao Xiao、Puren Han、Huiwen Zhou、Qi-Shuang Yin、Jian-Song Sun
DOI:10.1039/d0ob01812k
日期:——
2-glycosides through a palladium-catalyzed annulation/C-glycosylation sequence of o-alkynylanilines with 1-iodoglycals has been developed. This methodology has a wide scope of substrates and gives access to 3-indolyl-C-Δ1,2-glycosides in high yields. Furthermore, the product obtained here exhibits a high utility for further transformations.
A new chiral Brønsted acid, generated in situ from a chiral phosphoric acid boron (CPAB) complex and water, was successfully applied to asymmetric indole reduction. This "designer acid catalyst", which is more acidic than TsOH as suggested by DFT calculations, allows the unprecedented direct asymmetricreduction of C2-aryl-substituted N-unprotected indoles and features good to excellent enantioselectivities
Syntheses of <i>N</i>-Alkyl 2-Arylindoles from Saturated Ketones and 2-Arylethynylanilines via Cu-Catalyzed Sequential Dehydrogenation/Aza-Michael Addition/Annulation Cascade
We describe here a Cu-catalyzed and 4-OH-TEMPO-mediated sequential dehydrogenation/aza-Michael addition/annulation cascade reaction for the construction of N-alkyl 2-arylindoles from facilely available saturatedketones and 2-arylethynylanilines. This reaction shows high regioselectivity and tolerates a variety of functional groups. Moreover, 3-alkyl-substituted indoles can also be achieved when using
Nucleopalladation Triggering the Oxidative Heck Reaction: A General Strategy to Diverse β-Indole Ketones
作者:Qian Wang、Liangbin Huang、Xia Wu、Huanfeng Jiang
DOI:10.1021/ol4027683
日期:2013.12.6
A simple and efficient palladium-catalyzedoxidative coupling between 2-alkynyl anilines and allylic alcohols is described by using cheap and green dioxygen as the oxidant. These cross-couplings have a large functional group tolerance and are of higher reactivity toward electron nonbaised allylic alcohols. The resultant β-indole ketones are readily converted to pharmaceutically significant β-indole
通过使用廉价的绿色双氧作为氧化剂,描述了2-炔基苯胺和烯丙基醇之间简单而有效的钯催化的氧化偶合。这些交叉偶联具有大的官能团耐受性,并且对电子非卤代烯丙基醇具有更高的反应性。所得的β-吲哚酮易于转化为具有药学意义的β-吲哚醇/胺和吡咯并[2,1- a ]异喹啉。