Synthesis of Functional Derivatives of Benzofuran-5,6-dicarboxylic Acids
摘要:
Synthetic routes to novel substituted benzofuran-5,6-dicarboxylic acids and furo[2,3-f]isoindole-5,7-diones via acid hydrolysis of the corresponding benzofuran-5,6-dicarbonitriles were developed.
Synthesis of 5,6-dicyanobenzofurans based on 4-bromo-5-nitrophthalonitrile
摘要:
A new stereoselective method for the synthesis of substituted 5,6-dicyanobenzofurans by activated aromatic nucleophilic replacement of a bromine atom and a nitro group in 4-bromo-5-nitrophthalonitrile has been developed.
Reduction of 3-carbonyl-substituted 5,6-dicyanobenzofurans with sodium borohydride
作者:Zh. V. Chirkova、S. I. Filimonov、I. G. Abramov、S. I. Firgang、G. A. Stashina
DOI:10.1007/s11172-011-0256-y
日期:2011.8
AbstactReduction of 3-R-carbonyl-substituted 5,6-dicyanobenzofurans with sodiumborohydride was studied under various conditions. 3-R-Carbonyl-substituted 5,6-dicyanobenzofurans are selectively reduced in ethanol to substituted 3-R-(hydroxymethyl)-5,6-dicyano-2-methylbenzofurans, products of more deep reduction, viz., substituted 3-R-(hydroxymethyl)-2-methyl-2,3-dihydro-5,6-dicyanobenzofurans, 3-R-(hydroxymethyl)-5
Synthesis of 2-oxo- and 2-thioxo-5-(benzofuran-2-yl)tetrahydropyrimidines
作者:Sergei I. Filimonov、Zhanna V. Chirkova、Igor G. Abramov、Sergey I. Firgang、Galina A. Stashina、Kyrill Yu. Suponitsky
DOI:10.1016/j.mencom.2011.01.019
日期:2011.1
New 5,6-dicyanobenzofurans bearing a 2-(thi)oxotetrahydropyrimidine moiety at the 2-position were synthesized from 2-(2-dimethylaminovinyl)-5,6-dicyanobenzofurans, benzaldehydes and (thio)urea in AcOH.
Formation of 4-hydroxy-5-[aryl(alkyl)-1H-pyrazol-4-yl]benzene-1,2-dicarbonitriles in reactions of benzofurans with hydrazines
作者:Zh. V. Chirkova、M. V. Kabanova、D. V. Luferenko、S. I. Filimonov、I. G. Abramov
DOI:10.1134/s1070428015050103
日期:2015.5
Some regularities are discussed of the reaction between 3-substituted benzofuran-5,6-dicarbonitriles with hydrazines leading to the formation of new 4-hydroxy-5-[aryl(alkyl)-1H-pyrazol-4-yl]-benzene-1,2-dicarbonitriles.
Transformation of 3-Aroylbenzofurans into 2-Arylbenzofurans