新型的1,2-二芳基取代的吡咯并[3,4- b ]吡啶-5,7-二酮是通过3-芳基氨基-1-甲基-1 H-吡咯-2的碱催化环化反应高收率选择性合成的。室温下在乙腈中的5-二酮与肉桂醛及其衍生物。但是,当使用三氟乙酸哌啶鎓作为催化剂时,该反应以可比的产率提供了1,2-二芳基和1,4-二芳基取代的吡咯并[3,4- b ]吡啶-5,7-二酮的混合物。
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。
Molecular Diversity of Three-Component Reaction of<i>β</i>-Enamino Imide, Malononitrile and Cyclic<i>α</i>-Diketones
作者:Man Xiao、Chaoguo Yan
DOI:10.1002/cjoc.201700142
日期:2017.9
molecular diversity. The reactions with acenaphthylene‐1,2‐dione and ninhydrin afforded functionalized spiro[indene‐2,4'‐pyrrolo[3,4‐b]pyridines] and spiro[acenaphthylene‐1,4'‐pyrrolo[3,4‐b]pyridines] in good yields. The similar reaction of phenanthrene‐9,10‐dione resulted in the formation of the unexpected complex phenanthro[9',10':4,5]furo[2,3‐c]pyrrolo[3,4‐b]pyrroles in satisfactory yields.
碱促进了β-烯氨基酰亚胺,丙二腈和乙腈中各种环状α-二酮的三组分反应,显示出有趣的分子多样性。与1,2-二酮和茚三酮的反应得到官能化的螺[茚-2,4'-吡咯[3,4- b ]吡啶]和螺[[-1,4'-吡咯[3,4- b] [吡啶]]。菲-9,10-二酮的相似反应导致令人满意的未预期的复杂菲咯[9',10':4,5]呋喃[2,3- c ]吡咯并[3,4- b ]吡咯的形成产量。
Catalyzed synthesis of functionalized pyrrolo[3,4-b]quinolines via one-pot three-component reactions under conventional and nonconventional conditions
作者:Renata I. Eften’eva、Oleg V. Kushnir、Oleksandr S. Lyavinets、Ionel I. Mangalagiu、Myhailo V. Vovk
DOI:10.1007/s00706-017-1979-8
日期:2017.10
AbstractA general, facile, and efficient method for the synthesis of pyrrolo[3,4-b]quinolines is presented. The reactions pathway involve one-pot three-component reactions of β-enamino imides, aromaticaldehydes, and dimedone catalyzed by trifluoroacetic acid, under conventional thermal heating or ultrasounds irradiation, as nonconventional method of synthesis. It is shown that under ultrasounds irradiation
摘要介绍了一种合成吡咯并[3,4- b ]喹啉的简便,有效的方法。作为非常规合成方法,该反应途径涉及在常规热加热或超声辐射下由三氟乙酸催化的β-烯氨基酰亚胺,芳族醛和二甲酮的一锅三组分反应。结果表明,在超声波照射下,反应时间显着减少(从数小时到数分钟),并且在某些情况下,收率要好得多。 图形概要
Convenient synthesis of functionalized pyrrolo[3,4-b]pyridines and pyrrolo[3,4-b]quinolines via three-component reactions
作者:Yan-Hong Jiang、Man Xiao、Chao-Guo Yan
DOI:10.1039/c6ra03165j
日期:——
construction of pyrrolo[3,4-b]pyridine skeleton was successfully developed by base promoted three-component reaction of β-enamino imide, aromatic aldehydes and malononitrile as well as its ester and amide derivatives. The similar three-component reaction of β-enamino imide, aromatic aldehydes and cyclic diketones such as dimedone and cyclohexane-1,3-dione afforded functionalized pyrrolo[3,4-b]quinolines in good
通过β-烯氨基酰亚胺,芳族醛和丙二腈及其酯和酰胺衍生物的碱促进三组分反应,成功开发了一种简便的吡咯并[3,4- b ]吡啶骨架结构。β-烯氨基酰亚胺,芳族醛和环状二酮(如二甲酮和环己烷-1,3-二酮)的类似三组分反应以高收率提供了官能化的吡咯并[3,4- b ]喹啉。
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.
Various 1,4-dihydropyridine derivatives were efficiently synthesized from arylidenemalononitriles and β-enamino imides using DBU (3 mol%) as the catalyst at room temperature. This mild, straightforward high-yielding protocol was atom-economy, time-economy, with a low catalyst load, and without the need for reflux.