Aliphatic aldehydes in multicomponent syntheses of 4-alkyl-substituted partially hydrogenated quinolines, fused 4H-pyrans, and 2-amino-4-ethyl-5-methylbenzene-1,3-dicarbonitrile
摘要:
The Knoevenagel condensation of aliphatic aldehydes with CH acids, malonodinitrile, cyanothioacetamide, cyclohexane-1,3-dione, dimedone, 4-hydroxycoumarin, 3-aminophenol, and N-(cyclohex-1-enyl)morpholine leads to formation of 4-alkyl-substituted partially hydrogenated quinolines, fused 4H-pyrans, and 2-amino-4-ethyl-5-methylbenzene-1,3-dicarbonitrile. The structure of the latter was proved by the X-ray diffraction data.
Mono- and Bis-2-amino-4H-pyrans: Alum Catalyzed Three- or Pseudo Five-Component Reaction of 4-Hydroxycoumarin, Malononitrile and Aldehydes
作者:Ali Reza Karimi、Cyrus Eslami
DOI:10.2174/157017811794697421
日期:2011.2.1
An efficient method for the three- or pseudofive-componentsynthesis of mono- and bis-2-amino-4H-pyrans in excellent yields using Alum (KAl(SO4)2.12H2O) as recyclable catalyst is described. The present methodology offers several advantages such as excellent yields, simple procedures, shorter reaction times, milder conditions and the catalysts exhibited remarkable reusable activity.
Another application of (NH<sub>4</sub>)<sub>42</sub>[Mo<sup>VI</sup><sub>72</sub>Mo<sup>V</sup><sub>60</sub>O<sub>372</sub>(CH<sub>3</sub>COO)<sub>30</sub>(H<sub>2</sub>O)<sub>72</sub>] as a highly efficient recyclable catalyst for the synthesis of dihydropyrano[3,2-<i>c</i>]chromenes
catalyst for the synthesis of heterocyclic compounds, in this paper, we report another application of this attractive catalyst in the synthesis of 2‐amino‐5‐oxo‐4,5‐dihydropyrano[3,2‐c]chromene‐3‐carbonitriles via a one‐pot three‐component reaction of 4‐hydroxycoumarin, aldehydes and malononitrile. The reactions occur in ethanol–water as solvent at room temperature and the process is operative with
作者:A.H Bedair、Nagwa A El-Hady、M.S.Abd El-Latif、A.H Fakery、A.M El-Agrody
DOI:10.1016/s0014-827x(00)00097-5
日期:2000.12
The synthesis of new [1]benzopyrano[3',4':5,6]pyrano[2,3-d]pyrimidines and related heterocycles has been reported. The key intermediate 2-amino-3-cyano-4-methyl-4H,5H-pyrano[3,2-c][1]benzopyran-5-one (3) was obtained in one pot synthesis from the reaction of 4-hydroxycoumarin and acetaldehyde-malononitrile (2). The antimicrobial screening was performed for some of the synthesized compounds.
Aliphatic aldehydes in multicomponent syntheses of 4-alkyl-substituted partially hydrogenated quinolines, fused 4H-pyrans, and 2-amino-4-ethyl-5-methylbenzene-1,3-dicarbonitrile
作者:V. D. Dyachenko、A. N. Chernega
DOI:10.1134/s1070428006040142
日期:2006.4
The Knoevenagel condensation of aliphatic aldehydes with CH acids, malonodinitrile, cyanothioacetamide, cyclohexane-1,3-dione, dimedone, 4-hydroxycoumarin, 3-aminophenol, and N-(cyclohex-1-enyl)morpholine leads to formation of 4-alkyl-substituted partially hydrogenated quinolines, fused 4H-pyrans, and 2-amino-4-ethyl-5-methylbenzene-1,3-dicarbonitrile. The structure of the latter was proved by the X-ray diffraction data.
El-Agrody; Abd El-Latif; Fakery, Journal of Chemical Research, 2000, vol. 2000, # 1, p. 26 - 27