61222-94-4Relevant academic research and scientific papers
Activated Nitriles in Heterocyclic Synthesis: Synthesis of 6-Thiophen-2-yl and 6-Furan-2-ylthiazolopyridine Derivatives
Osman, Soad Abdel Meguid,Elgemeie, Galal Eldin Hamza,Nawar, Galal Abdel Moein,Elnagdi, Mohamed Hilmy
, p. 105 - 110 (1986)
A variety of new 6-thiophen-2-yl and 6-furan-2-ylthiazolopyridine derivatives could be prepared via the reaction of 2-functionally substituted methyl-2-thiazolin-4-one with cyanomethylenethiophen-2-yl and cyanomethylenefuran-2-yl derivatives.The st
Magnesium Halide-Catalyzed Synthesis of Oxaspiro[2.5]octenes from a Methylenecyclopropane and Acyl Cyanoalkenes
Ogura, Kazuki,Shibata, Ikuya,Shimazu, Jun-ya,Suzuki, Itaru
supporting information, p. 2785 - 2787 (2021/06/26)
MgX2-catalyzed annulation of methylenecyclopropanes with acyl cyanoalkenes was accomplished to give oxaspiro[2.5]octenes in excellent yields. The reaction proceeded through a rare intramolecular oxa-Michael addition of Mg enolate. The oxaspiro
Dienamine-Mediated Asymmetric Inverse-Electron-Demand Hetero-Diels–Alder Reaction of Linear Deconjugated Enones: Diversity-Oriented Synthesis of 3,4-Dihydropyrans
Maity, Rajendra,Pan, Subhas Chandra
supporting information, p. 871 - 874 (2017/02/15)
The first organocatalytic asymmetric inverse-electron-demand Diels–Alder reaction of deconjugated enones by using a linear dienamine was explored. Electron-poor oxadienes having a cyano group were found to be suitable in this reaction. With a 20 mol-% loa
Diels-Alder reactions of acyclic α-cyano α,β-alkenones: a new approach to highly substituted cyclohexene system
Amancha, Prashanth K.,Lai, Yi-Chun,Chen, I.-Chia,Liu, Hsing-Jang,Zhu, Jia-Liang
experimental part, p. 871 - 877 (2010/03/25)
The Diels-Alder reactions of a variety of acyclic α-cyano α,β-unsaturated ketones 8 have been investigated. With the assistance of boron trichloride, these compounds were found to undergo the cycloaddition readily with dienes to give the corresponding add
Regioselective synthesis of a new class of N-arylsulfonylaminated biheterocycles
Elgemeie, Galal Hamza,Sayed, Shahinaz Hassan
, p. 587 - 592 (2007/10/03)
A novel and efficient method for the synthesis of a new variety of novel N-arylsulfonylamino derivatives of biheterocycles by the reaction of N-cyanoaceto-arylsulphonylhydrazides with α,β-unsaturated nitriles. The synthetic potential of the method is demonstrated.
Replacement Substituent Constants for Simple Heterocycles
Robinson, Charles N.,Wiseman, Leonard J. Jr.,Slater, Carl D.
, p. 4103 - 4112 (2007/10/02)
13C nmr absorptions are reported for the β-vinylic carbon atoms in 15 series of ethylenes bearing heterocyclic substituents.The data are used to establish the best single-parameter substituent constants, ?13, for the various heterocycles as replacements for para-substituted benzenes.Also reported are replacement dual substituent constants, including ?I and the various ?R scales needed in the Taft DSP treatment and those for F and R used in the Swain-Lupton treatment.Values of ?13, F, R, ?I, and ?Ro, respectively, for the various heterocycles as replacements for para-substituted benzenes are as follows: 2-furyl, -1.01 , 0.99, -2.51, 0.65, -0.60; 2-pyrryl, -2.53, 0.52, -5.09, -0.16, -0.62; 2-thienyl, -0.79, 2.49, -3.60, 1.82, -1.08; 3-thienyl, -0.40, 1.04, -1.57, 0.59, -0.39; 2-pyridyl, 0.88, 2.09, -0.24, 1.65, -0.45; 3-pyridyl, 0.60, 0.57, 0.63, 0.35, 0.04; and 4-pyridyl, 1.18, 1.22, 1.09, 0.92, -0.01.The DSP-NLR method of analysis is explored using electron demand parameters, ε, as determined for the vinylic side chains in para-substituted styrenes.
α,β-Unsaturated Nitriles in Heterocyclic Synthesis: The Reaction of β-(2-Furanyl)- and β-(2-Thienyl)acrylonitrile with Active Methylene Reagents
Girgis, Nabih Saddik,Elgemeie, Galal Eldin Hamza,Nawar, Galal Abdel Moein,Elnagdi, Mohamed Hilmy
, p. 1468 - 1475 (2007/10/02)
The reactions of β-(2-furanyl)- and β-(2-thienyl)acrylonitrile with a variety of active methylene reagents are described.The investigations make several new pyran and pyranodiazole derivatives accessible.
