An environmentally-benign electrochemical approach for the construction of quinoline derivatives employing N,N-dimethylformamide (DMF) as the methine source has been devised by cyclization of 4-(phenylamino)-2H-chromen-2-ones. In a user-friendly undivided cell, 6H-chromeno[4,3-b]quinolin-6-ones were obtained under chemical oxidant-free and transition-metal-free conditions in 43–92% yields with high
已经通过 4-(苯基氨基) -2H -chromen-2-ones的环化设计了一种环境友好的电化学方法,用于构建使用N,N-二甲基甲酰胺 (DMF) 作为次甲基源的喹啉衍生物。在用户友好的无隔膜电解槽,6H -chromeno [4,3- b ]喹啉-6-酮进行化学氧化剂-自由和过渡金属-自由条件下在具有高功能性公差43-92%的产率获得。
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OAc‐Promoted Cascade Approach towards Aberrant Synthesis of Chromene‐Fused Quinolinones
作者:Santosh Kumari、S. M. Abdul Shakoor、Datta Markad、Sanjay K. Mandal、Rajeev Sakhuja
DOI:10.1002/ejoc.201801292
日期:2019.1.31
A concise cascade, metal‐free strategy for the synthesis of chromene‐fusedquinolinones was developed. This strategy is scalable, and an array of arylhydrazine hydrochlorides delivered chromene‐fusedquinolinones in good to excellent yields.
Iron/acetic acid mediated intermolecular tandem C–C and C–N bond formation: an easy access to acridinone and quinoline derivatives
作者:R. R. Rajawinslin、Sachin D. Gawande、Veerababurao Kavala、Yi-Hsiang Huang、Chun-Wei Kuo、Ting-Shen Kuo、Mei-Ling Chen、Chiu-Hui He、Ching-Fa Yao
DOI:10.1039/c4ra06410k
日期:——
An efficient iron/acetic acid mediated one pot reductive cyclization protocol was successfully developed for the synthesis of acridinone and quinoline derivatives.
一种高效的铁/醋酸介导的一锅式还原环化方案成功开发,用于合成吖啶酮和喹啉衍生物。
Aerobic, metal-free synthesis of 6<i>H</i>-chromeno[4,3-<i>b</i>]quinolin-6-ones
作者:Nhan N. H. Ton、Ha V. Dang、Nam T. S. Phan、Tung T. Nguyen
DOI:10.1039/c9ra02267h
日期:——
A Friedländer-based method for transition-metal free, aerobic synthesis of chromene-fused quinolinones is reported. The coupling of 4-hydrocoumarins and 2-aminobenzyl alcohols proceeds in the presence of acetic acid solvent and oxygen oxidant, affording 6H-chromeno[4,3-b]quinolin-6-ones in good to excellent yields. The reactions are tolerant of functionalities such as alkyl, methoxy, bromo, chloro
Synthesis of Coumarin Derivatives from 4-Oxo-4H-1-benzopyran-3-carboxaldehyde via 3-(Arylaminomethylene)chroman-2,4-dione
作者:Chandrakanta Bandyopadhyay、Kumar Ranabir Sur、Ranjan Patra、Arunabha Sen
DOI:10.1016/s0040-4020(00)00269-6
日期:2000.5
K-10 Montmorillonite mediated condensation of aldehyde 1 with arylamine 2 affords chroman-2,4-dione 5 which gives tricoumarol 8 by acid hydrolysis, 4-arylamino-3-formylcoumarin 11 and 1-benzopyrano[4,3-b]quinoline 12 on heating with POCl3.
K-10蒙脱土醛的缩合介导1与芳基胺2,得到苯并二氢吡喃-2,4-二酮5赋予tricoumarol 8通过酸水解,4-芳基氨基-3- formylcoumarin 11和1-苯并吡喃并[4,3- b ]喹啉12用POCl 3加热。