In vinyl nucleophilic substitution (S(N)vin) with the hydrochlorides or 4-toluenesulfonates of primary arylamines 1-alkyl-3-alkylaminopyrrole-2,5-diones form the corresponding 1-alkyl-3-arylaminopyrrole- 2,5-diones, which are also produced in situ from the corresponding arylaminofumarates and primary alkylamines.
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
Nucleophilic Phosphine-Promoted Domino Reaction of Dialkyl Acetylenedicarboxylates and 3-Arylamino-1-methyl-1H-pyrrole-2,5-diones
作者:Ying Han、Chao-Guo Yan、Chang-Zhou Liu、Yuan-Yuan Zhang、Jing Sun
DOI:10.1055/s-0037-1610438
日期:2018.9
ates in satisfactory yields. The three-component reaction of triphenylphosphine, dimethyl acetylenedicarboxylate and 3-arylamino-1-methyl-1H-pyrrole-2,5-diones in CH2Cl2 at room temperature resulted in functionalized 3-(triphenyl-λ5-phosphanylidene)succinates in nearly quantitative yields. However, tri(n-butyl)phosphine promoted reaction of dialkyl acetylenedicarboxylates and 3-arylamino-1-methyl-1H-pyrrole-2
摘要 三苯基膦的三组分反应,乙炔二和三芳基氨基-1-甲基- 1 H ^ -吡咯-2,5-二酮在CH 2氯2在室温下导致官能3-(三苯基-λ 5 -phosphanylidene)琥珀酸酯的收率接近定量。然而,三(正丁基)膦在CH 2 Cl 2中促进了乙炔二羧酸二烷基酯与3-芳基氨基-1-甲基-1 H-吡咯-2,5-二酮的反应,提供了官能化的吡咯并[3,4- b ]吡啶- 4-羧酸盐具有令人满意的产率。 三苯基膦的三组分反应,乙炔二和三芳基氨基-1-甲基- 1 H ^ -吡咯-2,5-二酮在CH 2氯2在室温下导致官能3-(三苯基-λ 5 -phosphanylidene)琥珀酸酯的收率接近定量。然而,三(正丁基)膦在CH 2 Cl 2中促进了乙炔二羧酸二烷基酯与3-芳基氨基-1-甲基-1 H-吡咯-2,5-二酮的反应,提供了官能化的吡咯并[3,4- b ]吡啶- 4-羧酸盐具有令人满意的产率。
Mannich Reaction of <i>α</i>-Aminomaleimides with Imines
A novel Mannich reaction of α-aminomaleimides with N-arylsulfonylimines was conducted in dimethyl sulfoxide using molecular sieves 4A. Remarkably promising new maleimide derivatives were efficiently and readily synthesized under mild reaction conditions.
Organocatalytic Enantioselective Michael Reaction of Aminomaleimides with Nitroolefins Catalyzed by Takemoto’s Catalyst
作者:Hongwen Mu、Yan Jin、Rongrong Zhao、Liming Wang、Ying Jin
DOI:10.3390/molecules27227787
日期:——
maleimides are often used as acceptors in Michael additions to produce succinimides. However, reactions with maleimides as nucleophiles for enantioselective functionalization are only rarely performed. In this paper, a series of bifunctional Takemoto’s catalysts were used to organocatalyze the enantioselective Michaelreaction of aminomaleimides with nitroolefins. The resulting products were obtained in
Base-promoted synthesis of dihydrochromeno[4,3-<i>d</i>]pyrrolo[3,4-<i>b</i>]pyridines from 4-chloro-3-substituted coumarins and α-aminomaleimides
作者:Abdolali Alizadeh、Azar Rostampoor
DOI:10.1039/d3ob00632h
日期:——
This paper describes the base-mediated cascade reactions of 4-chloro-3-substituted coumarins with α-aminomaleimides, allowing the efficient synthesis of dihydrochromeno[4,3-d]pyrrolo[3,4-b]pyridines with interesting chemoselectivity. These transformations include the domino-style formation of C–C/C–N bonds through a base-mediated nucleophilic substitution, Michael addition, N-cyclization, and elimination
本文描述了 4-氯-3-取代香豆素与 α-氨基马来酰亚胺的碱介导级联反应,允许有效合成具有有趣化学选择性的二氢色并[4,3-d]吡咯并[ 3,4- b ]吡啶。这些转化包括通过碱基介导的亲核取代、迈克尔加成、 N-环化和消除形成多米诺骨牌式的 C-C/C-N 键。所提出的合成策略有几个优点:它简单,使用容易获得的起始材料和环境友好的溶剂,具有高度化学选择性的路线,并且允许通过用EtOH(96%)洗涤来纯化产物,这是一种称为GAP(Group)的技术-辅助纯化)化学。