Transition-Metal-Free Catalyzed Dehydrative Coupling of Quinoline and Isoquinoline N-Oxides with Pro

来源 :中国化学(英文版) | 被引量 : 0次 | 上传用户:xiaoxuan415315
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
A novel,green,and transition-metal-free protocol for the facile modification of quinoline and isoquinoline derivatives is introduced,starting from readily available and environmentally benign quinoline and isoquinoline N-oxides with propargylic alcohols in the presence of Na2S2O8 or K2S2O8 at 100 ℃.The one-pot transformation features the advantages of good functional group compatibility,short reaction time,operational simplicity,and highly efficient reaction system.This protocol,which produces water as the only by-product,provides efficient and atom-economical access to a class of fascinating quinoline and isoquinoline products in satisfactory yields.The method is effective on the gram scale,thus highlighting the inherent practicality of this methodology.
其他文献
超级奥氏体不锈钢中因含有更高铬、钼含量,具有极高的耐点蚀、晶间腐蚀性能,这与Mo等合金元素对钝化膜结构的影响密切相关,尤其含硼超奥钢钝化层表面Cr、Mo含量明显增加,但其原子层次的微观作用机制尚不清楚.本文采用第一性原理方法,研究了置换原子(Mo、Mn、Ni、Si),及间隙原子B在fcc-Fe/Cr2O3界面占位倾向,并分析了可稳定存在于界面B对这些元素偏析倾向的影响.结果表明:Mo、Mn、Ni、Si、B均可与fcc-Fe/Cr2O3界面结构体系形成稳定结构;Mo、Ni倾向分布于界面基体侧,Mo有向氧化层
采用密度泛函理论方法,系统研究了1-乙基-3-甲基咪唑离子([C2 MIM]+)在三种不同管径的碳纳米管中的稳定结构、相互作用能和分子轨道性质.研究表明,随着碳纳米管管径的增加,[C2 MIM]+在碳纳米管内的稳定结构从居中的位置越发靠近碳纳米管的管壁,其与碳纳米管的结合能也从-45.52 kcal/mol降低到-39.45 kcal/mol.通过分析[C2 MIM]+在不同尺寸碳纳米管中的分子轨道排布,发现研究体系的HOMO轨道和LUMO轨道主要是局域在碳纳米管上,电子跃迁表现为π→π?,表明[C2 M
Rapid and real-time monitoring of food quality plays critical roles in the food industry and for the general public health.Herein,we specially synthesized a new perylene bisimide (PBI) derivative (PCB-EpE) composed of two PBI units and a rigid o-carborane
Development of subcellular organelle-targeted bioimaging probes is of great importance in the field of early detection of diseases and exploring the behaviors of subcellular organelles Herein,we present a triphenylphosphonium functionalized conjugated mac
Herein,we disclosed a photoredox enabled protocol for trifluoromethylacylation of styrenes through a radical-carboanion cascade and subsequent oxidation.With a broad range of aldehydes and inexpensive Langlois reagent as acyl and CF3 precursor,respectivel
A gold(Ⅰ)-catalyzed 6-endo-dig cyclization of aromatic 1,5-enynes was developed to synthesize 2-(naphthalen-2-yl)anilines.The func-tional group tolerance of this cyclization was examined systematically and a possible mechanism was proposed.The derivatizat
Polyarsenides containing coinage metals,[As7Cu(PPh3)]2-(1) and[M2As14]4-(M =Cu,2;Ag,3),were synthesized by reactions of the nominal composition K3As7 with Group 11 metal complexes.The possible intermediate,cluster 1,was isolated from the solution phase th
Hybeanones A and B (1 and 2),two highly oxygenated and rearranged polycyclic polyprenylated acylphloroglucinols (PPAPs),were isolated from the aerial parts of Hypericum beanii.Their structures comprising absolute configurations were elucidated by spectro-
Sr2CrBO6(B=Os,Re,W)被证实是具有最高磁转变温度的双钙钛矿氧化物.论文采用基于密度泛函理论的第一性原理方法,计算了Sr2CrBO6的电子结构和光学性质,并通过计算结果分析了二者之间的内在关系.总体来看,B位元素的改变对材料的电子结构和光学性质都产生了较大的影响.由能带结构的计算,Sr2CrOsO6为半导体,Sr2CrReO6和Sr2CrWO6为半金属.晶体介电函数虚部ε2(ω)曲线在所考察的能量范围内存在明显的介电特征峰,论文结合态密度和能带结构讨论了这些介电峰所对应的电子跃迁过程.Sr2
Under the catalysis of chiral Cu(Ⅱ) complex,C2 and C3 alkylation of pyrrole and C3 alkylation of indole were realized simultaneously.The chiral oxindole skeleton with an all-carbon quaternary stereogenic center at the C3-position could be obtained exclusi