[bmim]bf4-licl as an effective catalytic system for the synthesis of dicoumarols
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abstract
a homogeneous ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate doped with licl ([bmim]bf4-licl) was found as catalyst solvents for the synthesis of dicoumarols by the condensation of 4-hydroxycoumarin and aldehyde at 80 ˚c. in this field, several types of aromatic aldehyde, containing electron-withdrawing groups as well as electron-donating groups, were rapidly changed to the corresponding derivatives in good to excellent yields. application of this new homogeneous catalyst system offered the advantages of short reaction times, solvent-free conditions, high yields, and easy work-up procedure compared to the conventional methods of the syntheses. the ionic liquid can be recovered for the subsequent reactions and reused without any loss of efficiency.
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چکیده ندارد.
[BMIm]BF4-LiCl: An effective catalytic system for the synthesis of pyrano[3,2-c]chromene and pyrano[4,3-b]pyrone derivatives
An efficient and green method for the synthesis of pyrano[3,2-c]chromene or pyrano[4,3-b]pyrone derivatives is described by using a three-component condensation process of malononitrile, aldehyde, and 4-hydroxycoumarine or 4-hydroxypyrone in [BMIm]BF4-LiCl as an ionic liquid.
full text[BMIm]BF4-LiCl: An effective catalytic system for the synthesis of pyrano[3,2-c]chromene and pyrano[4,3-b]pyrone derivatives
An efficient and green method for the synthesis of pyrano[3,2-c]chromene or pyrano[4,3-b]pyrone derivatives is described by using a three-component condensation process of malononitrile, aldehyde, and 4-hydroxycoumarine or 4-hydroxypyrone in [BMIm]BF4-LiCl as an ionic liquid.
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15 صفحه اول[bmim]bf4-licl: an effective catalytic system for the synthesis of pyrano[3,2-c]chromene and pyrano[4,3-b]pyrone derivatives
an efficient and green method for the synthesis of pyrano[3,2-c]chromene or pyrano[4,3-b]pyrone derivatives is described by using a three-component condensation process of malononitrile, aldehyde, and 4-hydroxycoumarine or 4-hydroxypyrone in [bmim]bf4-licl as an ionic liquid.
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Journal title:
iranian chemical communicationPublisher: payame noor university (pnu)
ISSN 2423-4958
volume 3
issue Issue 4, pp. 283-387 2015
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