Solid Acid Catalysts for Coumarin Synthesis by the Pechmann Reaction: MOFs versus Zeolites
作者： Maksym Opanasenko , Mariya Shamzhy , Jiří Čejka
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摘要: The catalytic behavior of metal–organic frameworks Cu-benzene-1,3,5-tricarboxylate (CuBTC) and Fe-benzene-1,3,5-tricarboxylate (FeBTC) was investigated in the Pechmann condensation different phenols (resorcinol, pyrogallol, naphthol) with ethyl acetoacetate compared large-pore zeolites beta (BEA) ultrastable Y (USY). Zeolites BEA USY exhibited high activity transformations most active substrates (resorcinol pyrogallol) but a low conversion naphthol observed. Almost total transformation (94–98 % conversion) to target product achieved within 24 h reaction time over CuBTC FeBTC. We assume that regularity arrangement sites framework CuBTC, which results existence 2 centers close proximity, is critical importance leads coumarin.
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