在本文中,我们报告了2-氨基查尔酮与可见光驱动的双功能亲核试剂的串联环异构化/亲核加成/环化反应。这种级联过程是通过在室温下照射蓝色LED来实现的,这为结构上多样化的苯并[ d ] [1,3]恶唑啉骨架提供了一条简洁的途径。机理研究表明,反应是在可见光照射下,由C–C双键的E到Z异构化开始的,然后环化/再芳构化以生成瞬态喹啉中间体,该中间体被亲核试剂捕获并环化生成多环苯并[ d ] [1,3]恶唑啉。
Synthesis of 2-Substituted Quinolines from 2-Aminostyryl Ketones Using Iodide as a Catalyst
作者:So Young Lee、Jiye Jeon、Cheol-Hong Cheon
DOI:10.1021/acs.joc.8b00552
日期:2018.5.4
A new protocol for the synthesis of 2-substituted quinolinesfrom 2-aminostyryl ketones has been developed using iodide as a nucleophilic catalyst. Conjugate addition of iodide to 2-aminostyryl ketones yielded the corresponding β-iodoketones, which could have a conformation where the amino and carbonyl groups are proximal through free rotation about the Cα–Cβ single bond. Subsequent condensation between
A New and Direct Synthesis of Chalcones Via TFAA-H3PO4 Mediated C-C Bond Forming Reaction
作者:Kavitha Kankanala、Lingam Venkata Reddy、Vangala Ranga Reddy、Khagga Mukkanti、Sarbani Pal
DOI:10.2174/157017811794557750
日期:2011.1.1
A number of α,β-unsaturated carboxylic acids were reacted with electron rich arenes or heteroarene in the presence of trifluoroacetic anhydride (TFAA) and H3PO4 at room temperature to give a variety of chalcone derivatives in good to excellent yields. The methodology was used to prepare novel compounds of potential pharmacological significances.
A blue-light-promoted carbon-carbon double bondisomerization in the absence of any photoredox catalyst is reported. It provides rapid access to a series of quinolines in good to excellent yields under simple aerobic conditions. The protocol is direct, catalyst-free and operationally convenient.
A new cross‐cycloaddition reaction between a wide range of isocyanides and 2‐isocyanochalcones (or analogues) was developed for the expeditious synthesis of pyrrolo[3,4‐b]indoles under thermal conditions. On the basis of the experimental results and DFT calculations, a mechanism for this domino reaction is proposed involving chemoselective heterodimerization of two different isocyanides to form 1,4‐diazabutatriene
Continuous Flow Synthesis of Quinolines via a Scalable Tandem Photoisomerization‐Cyclization Process
作者:Mara Di Filippo、Marcus Baumann
DOI:10.1002/ejoc.202000957
日期:2020.10.22
A continuous flow process exploiting a light‐driven method for generating a series of drug‐like quinolines is reported and applied to the synthesis of the alkaloid natural product galipinine.