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Please use this identifier to cite or link to this item: http://purl.org/purl/2054

Title: Studies on the Synthesis and Transformations of a few Bicyclic and Dispiro Compounds
Authors: Jean John, Vadakkan
Dr.Prathapan, S
Keywords: Diels-Alder Reaction
Di-π-methane Rearrangement
Lewis acid catalysed Diels-Alder Reaction
Hetero Diels-Alder Reaction
Intermolecular Diels-Alder Reaction
Intramolecular Diels-Alder Reaction
Photochemical Studies
Bicyclic compounds
Issue Date: Sep-2002
Publisher: Cochin University of Science & Technology
Abstract: In this thesis, we report our endeavours in the synthesis of a few polycyclic compounds. We were interested in the synthesis of a few bicyclic compounds designed to undergo interesting photochemical transformations including tripletmediated di-π-methane rearrangement and/or competing singlet-mediated electrocyclic reactions. Our target molecules have "inbuilt" structural features which will potentially alter the photochemistry of the substrate under consideration.The present investigation was undertaken to test our hypothesis on selective intramolecular quenching of singlet or triplet excited states of molecules.We adopted Dies-Alder reaction for the synthesis of several of the bicyclic compounds we were interested in. Some of the precursor dienes synthesised by us are capable of undergoing intramolecular cycloaddition reactions as well. So, it was important to delineate the conditions and structural features that will enable a particular molecule to undergo intermolecular and intramolecular Dies-Alder reaction when treated with a suitable dienophile.Though, the main focus of this thesis is on the synthesis of bicyclic and tricyclic systems capable of undergoing di-π-methane rearrangement, in the last chapter of this thesis, we describe our findings on the synthesis of a few dispirocompounds. These systems were encountered as unexpected products in the attempted synthesis of novel dibenzoylalkene-type systems. Consequently, a brief survey on the synthesis and transformations of dibenzoylalkenes is also included as an integral part of this thesis.
Description: Department of Applied Chemistry, Cochin University of Science and Technology
URI: http://dyuthi.cusat.ac.in/xmlui/purl/2054
Appears in Collections:Faculty of Sciences

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