Combined Computational and Experimental Studies on the Asymmetric Michael Addition of α-Aminomaleimides to β-Nitrostyrenes Using an Organocatalyst Derived from <i>Cinchona</i> Alkaloid
their application as nucleophiles is limited to only a few reactions, and reactions utilizing α-aminomaleimides as asymmetric Michael donors have not been reported to date. Thus, in this work, asymmetric Michaeladdition of α-aminomaleimides as Michael donors to β-nitrostyrenes was conducted for the first time using an organocatalyst derived from a Cinchona alkaloid. Density functional theory investigations
N-alkyl aminomaleimide dyes with various kinds of N-alkyl groups were synthesized in a one pot process. The synthesized dyes exhibited different emission behaviors depending on the chemical structure of the N-alkyl group, although they had no direct contribution to the π-conjugated system. Chain length, hydroxyl group and branching structure were important in the emission properties such as quantum yield
Enaminones in Heterocyclic Syntheses: Part 4. A New One-Step Synthetic Route to Pyrrolo[3,4-<i>b</i>]pyridine and Convenient Syntheses of 1,4-Dihydropyridines and 1,1′-(1,4-Phenylene)bis(1,4-dihydropyridine)
作者:M. M. Mashaly、S. R. El-Gogary、T. R. Kosbar
DOI:10.1002/jhet.1609
日期:2014.7
Reactions of cyano olefins with (i) enamino imides afforded novel pyrrolo[3,4‐b]pyridines; (ii) enamino esters afforded new 1,4‐dihydropyridines; and (iii) bisenamino ester afforded new1,1′‐(1,4‐phenylene)bis(1,4‐dihydropyridine). The new derivatives are planned as suggested drug candidates.
氰基烯烃与(i)烯氨基酰亚胺的反应提供了新型的吡咯并[3,4- b ]吡啶;(ii)烯氨基酯提供了新的1,4-二氢吡啶; (iii)联氨基酯提供了新的1,1'-(1,4-亚苯基)双(1,4-二氢吡啶)。新的衍生物计划作为候选药物。
An Efficient Synthesis of Spiropyrroloquinolines by the Domino Reaction of α-Dicarbonyl Compounds and Anilinosuccinimides
作者:Man Xiao、Qiu Sun、Jing Sun、Chao-Guo Yan
DOI:10.1002/ejoc.201701356
日期:2017.12.15
Under the catalysis of Bronsted acid, the domino annulation reaction of different α-dicarbonylcompounds with anilinosuccinimides under microwave irradiation afforded functionalized spiropyrroloquinolines involving the activation of ortho-H in different aniline derivatives.
Synthesis of fused pyrrolo[3,4-d]tetrahydropyrimidine derivatives by proline-catalyzed multicomponent reaction
作者:Zhi-Peng Chen、Hai-Bo Wang、Yu-Qin Wang、Qiu-Hua Zhu、Yang Xie、Shu-Wen Liu
DOI:10.1016/j.tet.2014.04.075
日期:2014.7
Novel proline-catalyzed multicomponent reactions (MCRs) for the synthesis of fused pyrrolo[3,4-d]tetrahydropyrimidines 7 and 9 with different substituted patterns have been developed, which provide rapid access to a library of compounds 7 and 9 in medium to excellent yields, by using N-methyl-α-aryl(alkyl)aminomaleimides, amines, and aldehydes as reactants. The catalyst and the ratio of reactants were
已开发出新型脯氨酸催化的多组分反应(MCR),用于合成具有不同取代模式的稠合吡咯并[3,4- d ]四氢嘧啶7和9,可在中等至极好的条件下快速访问化合物7和9的文库。通过使用N-甲基-α-芳基(烷基)氨基马来酰亚胺,胺和醛作为反应物,可得到苯甲酸酯。发现催化剂和反应物的比例对这些反应有显着影响,并提出了合理的机理。