A Simple Route to Polysubstituted Indoles Exploiting Azide Induced Furan Ring Opening
摘要:
A straightforward, efficient indole synthesis based on thermolysis of 2-(2-azidobenzyl)furans with attack of the formed nitrene moiety onto the ipso position of furan ring has been developed. The cyclization is accompanied by furan ring opening and affords indoles with a 2-acylvinyl substituent suitable for further modifications.
Intramolecular addition of diarylmethanols to imines promoted by KOt-Bu/DMF: a new synthetic approach to indole derivatives
作者:Jia-hua Chen、Zi-cong Chen、Hong Zhao、Ting Zhang、Wei-juan Wang、Yong Zou、Xue-jing Zhang、Ming Yan
DOI:10.1039/c6ob00423g
日期:——
KOt-Bu/DMF promoted intramolecular addition of diarylmethanols to imines was developed. A series of 2,3-disubstituted indoles was obtained in good yields. A reaction mechanism of radical cyclization and subsequent dehydration is proposed.
开发了KO t -Bu / DMF促进的二芳基甲醇分子内加成至亚胺。以高收率获得了一系列的2,3-二取代的吲哚。提出了自由基环化和随后脱水的反应机理。
A Metal-Free Approach Toward Saturated<i>N</i>-Propargyl Heterocycles via an Annulation/Decarboxylative Coupling Sequence
作者:Huangdi Feng、Huihui Jia、Zhihua Sun
DOI:10.1002/adsc.201500044
日期:2015.8.10
oxazolidines, 1,3‐oxazinanes and thiazolidine bearing a diverse range of substituents in good yields. The transformation involves a cascade process that begins with an annulation and is followed by the metal‐free decarboxylative coupling.
Intramolecular cyclization of diarylmethanols and α,β-unsaturated amides promoted by KOt-Bu/DMF: a metal-free approach towards 3,4-disubstituted quinolinones
作者:Jia-hua Chen、Zi-cong Chen、Hong Zhao、Yong Zou、Xue-jing Zhang、Ming Yan
DOI:10.1039/c6ob02119k
日期:——
A facile synthesis of quinolinones through intramolecular addition of diarylmethanols to α,β-unsaturated amides promoted by KOt-Bu/DMF is reported. A series of 3,4-disubstituted quinolinones were obtained in moderate to good yields. A reactionpathway via the ketyl radical is proposed.
据报道,通过将二芳基甲醇分子内加到由KO t -Bu / DMF促进的α,β-不饱和酰胺上,可以容易地合成喹啉酮。以中等至良好的产率获得了一系列的3,4-二取代的喹啉酮。提出了通过酮基的反应途径。
Here we report an iron-complex-catalyzed synthesis of various mono- and di-substituted quinolin-2(1H)-ones achieved via the intramolecular acceptorless dehydrogenative cyclization of amido-alcohols. This approach for the synthesis of N-heterocycles has provided access to underdescribed disubstituted quinolinones and represents an alternative to the well-known palladium-catalyzed coupling reactions
在这里,我们报道了通过酰胺醇的分子内无受体脱氢环化实现的各种单取代和双取代的喹啉-2(1 H )-酮的铁络合物催化合成。这种合成 N-杂环的方法提供了获得未描述的二取代喹啉酮的途径,并且代表了众所周知的钯催化偶联反应的替代方案。
Lednicer,D.; Emmert,D.E., Journal of Heterocyclic Chemistry, 1971, vol. 8, p. 903 - 910