An expeditious synthesis of novel pyranopyridine derivatives involving chromenes under controlled microwave irradiation
作者:Dushyant Singh Raghuvanshi、Krishna Nand Singh
DOI:10.3998/ark.5550190.0011.a25
日期:——
An efficient synthesis of novel pyrano[2,3-b]pyridine derivatives has been achieved by the cyclocondensation of 2-amino-3-cyano-4H-chromenes and cyclohexanone in the presence of aluminium chloride undercontrolledmicrowaveirradiation. The experimental conditions have been thoroughly optimized and established, allowing significant rate enhancements and excellent yields. The starting 4H-chromenes were
Aqua-mediated multicomponent synthesis of various 4H-pyran derivatives catalyzed by poly(4-vinylpyridine)-supported copper iodide nanoparticle catalyst
作者:Jalal Albadi、Azam Mansournezhad
DOI:10.1007/s11164-015-2400-z
日期:2016.6
A green and efficient approach for synthesis of some new 4 H -pyran derivatives is reported, catalyzed by green recyclable poly(4-vinylpyridine)-supported copper iodide nanoparticle catalyst in water. This procedure has many advantages such as operational simplicity, short reaction time, clean procedure, and high product yield.
A green route towards substituted 2-amino-4H-chromenes catalyzed by an organobase (TBD) functionalized mesoporous silica nanoparticle without heating
作者:Bikash Karmakar、Rajesh Nandi
DOI:10.1007/s11164-016-2755-9
日期:2021.5
1,5,7-Triazabicyclo-[4,4,0]-dec-1-ene functionalized mesoporous silica nanoparticle promoted one-pot multicomponent synthesis of 2-amino-4H-chromenes from a phenolic component, different aldehydes and malononitrile was achieved in aqueous media at room temperature. The methodology promises advantages of short reaction times, environmentally benign conditions, high yields, and operational convenience
Tungstic acid functionalized mesoporous SBA-15: A novel heterogeneous catalyst for facile one-pot synthesis of 2-amino-4H-chromenes in aqueous medium
作者:Sudipta K. Kundu、John Mondal、Asim Bhaumik
DOI:10.1039/c3dt50947h
日期:——
A new highly ordered mesoporous tungstic acid functionalized SBA-15, TAFMC-1 has been synthesized via post-synthesis modification of mesoporousSBA-15 with (3-chloropropyl) triethoxysilane followed by substitution reaction of chlorine atom of the 3-chloropropyl group by tungstic acid group under refluxing conditions in n-hexane. The tungstic acid functionalized mesoporoussilica material has been characterized
Sulfonic acid-functionalized MIL-101(Cr) as a highly efficient heterogeneous catalyst for one-pot synthesis of 2-amino-4H-chromenes in aqueous medium
作者:Mrinal Saikia、Lakshi Saikia
DOI:10.1039/c5ra28135k
日期:——
Sulfonic acid-functionalized MIL-101(Cr) was established to be an active heterogeneous catalyst for the one-potsynthesis of 2-amino-4H-chromenes via a three-componentcondensation reaction between resorcinol, malononitrile and a diverse range of aromatic aldehydes in aqueousmedium. Here, sulfonation of the parent MIL-101(Cr) has been carried out through a post synthetic modification (PSM) technique