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。
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
Copper-Catalyzed Cyclization for Access to 6<i>H</i>-Chromeno[4,3-<i>b</i>]quinolin-6-ones Employing DMF as the Carbon Source
作者:Yiyi Weng、Hao Zhou、Chen Sun、Yuanyuan Xie、Weike Su
DOI:10.1021/acs.joc.7b01515
日期:2017.9.1
The first example of the copper-catalyzed cyclization of 4-(phenylamino)-2H-chromen-2-ones employing the N-methyl moiety of DMF as the source of the methine (CH) group has been developed, providing an efficient synthetic pathway to access novel functionalized 6H-chromeno[4,3-b]quinolin-6-ones in moderate to good yields.