One-pot synthesis of 6,11-dihydro-5H-indolizino[8,7-b]indoles via sequential formation of β-enamino ester, Michael addition and Pictet–Spengler reactions
作者:Dan Zhu、Jing Sun、Chao-Guo Yan
DOI:10.1039/c4ra10355f
日期:——
les in the presence of anhydrous ZnCl2 to give functionalized 2-pyrrolo-3′-yloxindoles in satisfactory yields, which can be further converted to the corresponding 6,11-dihydro-5H-indolizino[8,7-b]indoles in good yields through a CF3SO3H catalyzed Pictet–Spengler cyclization process. Under similar conditions, when arylamines were used to replace tryptamine, the one-pot domino reaction afforded the functionalized
在无水ZnCl 2存在下,通过将色胺加到丙酸烷基酯中而生成的β-烯氨基酯与3-苯并亚甲基吲哚反应,以令人满意的收率得到官能化的2-吡咯并3'-yloxindole,可以将其进一步转化为相应的6,11通过CF 3 SO 3 H催化的Pictet-Spengler环化过程,可以使-dihydro -5 H -indolizino [8,7- b ]吲哚获得高收率。在相似的条件下,当使用芳基胺代替色胺时,一锅多米诺反应提供了功能化的2-吡咯基-3'-羟基吲哚。
Formation of 1,2-Dihydroquinoline-3-carboxylic Acid Derivatives from Methyl 3-(Arylamino)acrylates with Hydrogen Iodide
作者:Shoji Matsumoto、Takahiro Mori、Motohiro Akazome
DOI:10.1055/s-0030-1258229
日期:2010.11
The reaction of methyl 3-(arylamino)acrylates with hydrogen iodide gave 1,2-dihydroquinoline-3-carboxylic acid derivatives at room temperature. This reaction proceeds efficiently in alcoholic solvent; bulky tert-butyl alcohol is the best solvent to give the 1,2-dihydroquinoline derivatives. It is particularly interesting that hydrogen iodide is the most efficient acid to achieve this reaction in tert-butyl
Synthesis of Functionalized 2-Aminohydropyridines and 2-Pyridinones via Domino Reactions of Arylamines, Methyl Propiolate, Aromatic Aldehydes, and Substituted Acetonitriles
作者:Jing Sun、Yan Sun、Er-Yan Xia、Chao-Guo Yan
DOI:10.1021/co200071v
日期:2011.7.11
An efficient and practical synthetic method for the functionalized 2-amino hydropyridines and 2-pyridinones was successfully developed via the domino reactions of arylamines, methyl propiolate, aromatic aldehydes and the substituted acetonitriles with triethylamine as base catalyst. Reactions involving malononitrile and cyanoacetamide gave exclusively the 2-aminohydropyridines. On the other hand ethyl cyanoacetate resulted in the 2-pyridinones as main products.
Domino reaction of arylamine, methyl propiolate, aromatic aldehyde, and indole for facile synthesis of functionalized indol-3-yl acrylates
作者:Li-Li Zhang、Jing Sun、Chao-Guo Yan
DOI:10.1016/j.tetlet.2012.10.043
日期:2012.12
In the presence of FeCl3 as catalyst the one-pot domino reactions of arylamines, methyl propiolate, aromatic aldehydes, and indole in ethanol at room temperature proceeded smoothly to give methyl 2-(1H-indol-3-yl)arylmethyl-3-arylamino)acrylates in good yields. H-1 NMR spectra and single crystal structures indicated that (Z)-acrylates were stereoselectively formed in the reactions. (C) 2012 Elsevier Ltd. All rights reserved.
Povarov Reaction of β-Enamino Esters and Isatin-3-imines for Diastereoselective Synthesis of Spiro[indoline-3,2′-quinolines]
作者:Chao-Guo Yan、Hong Gao、Jing Sun
DOI:10.1055/s-0033-1340459
日期:——
The p-toluenesulfonic acid catalyzed Povarov reaction of isatin-3-imines with beta-enamino esters, which were generated in situ from the reaction of arylamines and methyl propiolate in ethanol, afforded the polysubstituted spiro[indoline-3,2'-quinolines] in high yields and with high diastereoselectivity.