61222-94-4Relevant articles and documents
Reactions with 2-aminobenzimidazole: Synthesis of several new pyrimido[1,2-a]benzimidazole derivatives
Abdelhamid,Riad,Aziz
, p. 642 - 646 (1987)
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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
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
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.