描述了一种新型的无金属方案,可通过偶氮二羧酸二乙酯(DEAD)促进的氧化[3 + 2]环加成/芳构化串联反应有效和高效地构建吡咯并[2,1- a ]异喹啉。代替已报道的二组分氧化系统,DEAD作为唯一的氧化剂,可以通过氧化-去质子串联过程将叔胺平稳地转移至偶氮甲亚胺。反应在较宽的底物范围内进行,从而产生中等至良好的分离产率的产物。
A novel KI/TBHP-catalyzed 1,3-dipolar cycloaddition/oxidation/aromatization cascade reaction provided a general, efficient and green access to biologically important pyrrolo[2,1-a]isoquinolines.
Sequential Photo-oxidative [3 + 2] Cycloaddition/Oxidative Aromatization Reactions for the Synthesis of Pyrrolo[2,1-<i>a</i>]isoquinolines Using Molecular Oxygen as the Terminal Oxidant
We report an efficient method for the synthesis of pyrrolo[2,1-a]isoquinolinederivatives using sequential [3 + 2] cycloaddition/oxidative aromatization reactions catalyzed by methylene blue with fluorescent light irradiation under an oxygen atmosphere. The products were obtained in moderate to good yields.
我们报告了一种有效的合成吡咯并[2,1- a ]异喹啉衍生物的方法,该方法使用连续[3 + 2]环加成/氧化芳构化反应,由亚甲基蓝在氧气气氛下用荧光灯催化。以中等至良好的产率获得产物。
Photocatalytic Oxidative [3+2] Cycloaddition for Pyrrolo[2,1‐<i>a</i>]isoquinoline Synthesis Using a Porphyrin‐Based Covalent Organic Framework
A porphyrin-based COF promoted photocatalytic dipolar [3+2] cycloaddition reaction for pyrrolo[2,1-a]isoquinoline synthesis is reported. Various substituted pyrrolo[2,1-a]isoquinolines were obtained in moderate to good yields via the photocatalyticoxidative [3+2] cycloaddition reaction between tetrahydroisoquinolines and N-substituted maleimides under aerobic conditions at room temperature.
报道了一种基于卟啉的COF促进吡咯并[2,1- a ]异喹啉合成的光催化偶极[3+2]环加成反应。通过四氢异喹啉与N-取代马来酰亚胺在室温有氧条件下的光催化氧化[3+ 2 ]环加成反应,以中等至良好的收率获得了各种取代的吡咯并[2,1-a]异喹啉。
Iodine-Catalyzed 1,3-Dipolar Cycloaddition/Oxidation/Aromatization Cascade with Hydrogen Peroxide as the Terminal Oxidant: General Route to Pyrrolo[2,1-<i>a</i>]isoquinolines
We report a novel molecular iodine-catalyzed 1,3-dipolar cycloaddition/oxidation/aromatization cascade process with hydrogen peroxide as the terminal oxidant for the construction of pyrrolo[2,1-a]isoquinolines. The product pyrrolo[2,1-a]isoquinolines were obtained from reactions between simple, readily available dipolarophiles and tetrahydroisoquinolines in moderate to excellent yields without the need for a metal catalyst.