Isomerization of Ninhydrin-Heterocyclic Ketene Aminal Adducts: Kinetic versus Thermodynamic Control, Solvent Dependency and Mechanism
作者:Nanyang Chen、Minming Zou、Xue Tian、Fengjuan Zhu、Danping Jiang、Jiagao Cheng、Xusheng Shao、Zhong Li
DOI:10.1002/ejoc.201402677
日期:2014.10
Ninhydrin and heterocyclic ketene aminals (HKAs) are versatile building blocks in organic chemistry. Reactions of ninhydrin with HKAs initially produced the kinetic products indeno[1,2-b]pyrrol-4(1H)-one derivatives, which could further isomerize to thermodynamic counterparts indeno[2,1-b]pyrrol-8(1H)-ones. The isomerization showed a strong solvent dependency and occurred through a decomposition–reconstruction
Synthesis of novel tetracyclo-isocoumarins via AcOH-catalyzed cascade reaction of heterocyclic ketene aminals with 2,2-dihydroxy-2H-indene-1,3-dione
作者:Sheng-jiao Yan、Yu-lan Chen、Lin Liu、Ya-juan Tang、Jun Lin
DOI:10.1016/j.tetlet.2010.11.100
日期:2011.1
A facile synthesis of tetracyclo-isocoumarins based on the AcOH-catalyzed cyclocondensation and rearrangement reaction between heterocyclicketeneaminals and 2,2-dihydroxy-2H-indene-1,3-dione is described. This method provides direct access to tetacyclo-isocoumarins, a class of compounds with potential broad spectrum biological activities.
Three-Component Synthesis of Indanone-Fused Spirooxindole Derivatives
作者:Xue-Bing Chen、Xi-Ming Liu、Rong Huang、Sheng-Jiao Yan、Jun Lin
DOI:10.1002/ejoc.201300376
日期:2013.7
A simple, straightforward and versatile multicomponent protocol for the synthesis of indanone-fused spirooxindole derivatives has been developed. The strategy involves the one-pot three-component reaction of heterocyclic ketene aminals, 1H-indene-1,3(2H)-dione and the dicarbonyl compounds isatins or acenaphthenequinone in an ethanol/water medium catalysed by p-TSA at reflux. Mild reaction conditions
Double tandem cyclization of 4-(1-acyl-2,2-diaminovinyl)-6-arylpyrimidine-5-carbonitriles. Synthesis of novel peri-annulated azines
作者:Maia N. Putintseva、Olga Yu. Bakulina、Alexander Yu. Ivanov、Pavel S. Lobanov、Sofia K. Nikolskaya、Ilya E. Kolesnikov、Dmitry V. Dar’in
DOI:10.1016/j.tetlet.2016.10.020
日期:2016.11
A series of novel peri-fused azines, pyrimido[4,5,6-de]quinolino[2,3-b][1,8]naphthyridines and benzo[b]pyrimido[4,5,6-de][1,8]naphthyridines, were prepared via the base-promoted double tandem cyclization of 4-(1-acyl-2,2-diaminovinyl)-6-(haloaryl)pyrimidine-5-carbonitriles. This transformation represents a rare example of the one-pot synthesis of peri-annulated polycyclic structures from non-fused
一系列新型的周边融合杂志,嘧啶基[4,5,6- de ]喹啉[2,3- b ] [1,8]萘啶和苯并[ b ]嘧啶[4,5,6- de ] [1通过碱促进的4-(1-酰基-2,2-二氨基乙烯基)-6-(卤代芳基)嘧啶-5-腈的双串联环化反应制备1,8]萘啶。这种转化代表了由非稠合杂环一锅合成周环多环结构的罕见例子。发现合成的嘧啶并[4,5,6- de ]喹啉基[2,3- b ] [1,8]萘啶是发光体。
Cyclocondensation of Ethyl (imidazolidine-2-ylidene)acetate with Aromatic Esters Bearing Labile Halogen in<i>ortho</i>-Position
作者:D. V. Dar'in、А. Yu. Ivanov、P. S. Lobanov
DOI:10.1002/jhet.2229
日期:2015.7
Cyclocondensation of ethyl (imidazolidine‐2‐ylidene)acetate with aromatic esters bearing labilehalogen in ortho‐position leads to fused heterocycles, which is formed by substitution of halogenatom with α‐carbon atom of cyclic ketene aminal and binding of nitrogen atom with carbonyl carbon atom of aromatic ester.