Beckmann rearrangement of E,E-cinnamaldoxime on rare earth exchanged (Ce3+, La3+, and RE3+) HFAU-Y zeolites: An efficient green process for the synthesis of isoquinoline

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Beckmann rearrangement of E,E-cinnamaldoxime on rare earth exchanged (Ce3+, La3+, and RE3+) HFAU-Y zeolites: An efficient green process for the synthesis of isoquinoline

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dc.contributor.author Bejoy, Thomas
dc.contributor.author Prathapan, S
dc.contributor.author Sugunan, S
dc.date.accessioned 2011-10-01T04:25:04Z
dc.date.available 2011-10-01T04:25:04Z
dc.date.issued 2005-09
dc.identifier.issn 1387-1811
dc.identifier.uri http://dyuthi.cusat.ac.in/purl/2315
dc.description.abstract In this paper, a novel application of solid acid catalysts in the Beckmann rearrangement of E,E-cinnamaldoxime in the synthesis of an important heterocyclic compound; isoquinoline is reported. E,E-Cinnamaldoxime under ambient reaction conditions on zeolite catalysts underwent Beckmann rearrangement to produce isoquinoline in yields of ca. 86–95%. Cinnamonitrile and cinnamaldehyde were formed as by-products. LaH-Y zeolite produces maximum amount of the desired product (yield 95.6%). However, the catalysts are susceptible for deactivation due to the basic nature of the reactants and products, which neutralize the active sites. H-Y zeolite is more susceptible (22% deactivation in 10 h) for deactivation compared to the cerium-exchanged counterpart (18% deactivation in 10 h). Thus, the optimal protocol allows isoquinoline to be synthesised in excellent yields through the Beckmann rearrangement of cinnamaldoxime. The reaction is simple, effective, does not involve any other additives, and environmentally benign. en_US
dc.description.sponsorship Cochin University of Science and Technology en_US
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.subject Beckmann rearrangement en_US
dc.subject Cinnamaldehyde en_US
dc.subject E,E-Cinnamaldoxime en_US
dc.subject Cinnamonitrile en_US
dc.subject E–Z Isomerization en_US
dc.subject Isoquinoline en_US
dc.subject Rare earth H-Y zeolites en_US
dc.title Beckmann rearrangement of E,E-cinnamaldoxime on rare earth exchanged (Ce3+, La3+, and RE3+) HFAU-Y zeolites: An efficient green process for the synthesis of isoquinoline en_US
dc.type Working Paper en_US
dc.contributor.faculty Science en_US
dc.identifier.url http://www.sciencedirect.com/science/article/pii/S1387181105001575 en_US


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