Use this URL to cite or link to this record in EThOS: http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.680257
Title: Inter and intramolecular N-conjugate addition reactions using cinchona derived primary amines
Author: Ball, Anthony
ISNI:       0000 0004 5914 7189
Awarding Body: University of Nottingham
Current Institution: University of Nottingham
Date of Award: 2015
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Abstract:
This thesis describes the conjugate addition of nitrogen nucelophiles to alpha,beta-unsaturated enones using cinchona derived amines. Two separate projects are outlined within, intermolecular and intramolecular N-conjugate addition reactions. The first project involves the investigation of a range of nitrogen nucleophiles in their intermolecular additions to alpha,beta-unsaturated ketones. The reactions were performed using either 9-deoxy-9-epi-aminoquinine or 9-deoxy-9-epi-aminoquinidine as the catalyst with phenylacetic acid as a co-catalyst. These catalysts were found to promote conjugate addition of a range of nitrogen heterocycles to acyclic alpha,beta-unsaturated ketones. In particular, the addition of pyrazoles was found to proceed in high yield and enantioselectivity. In contrast, addition of these nucleophiles to cyclic ketones gave low enantioselectivity. The second project involves the investigation of intramolecular N-conjugate addition processes. In this case, the reactions were performed using 9-deoxy-9-epi-aminoquinine and trifluoroacetic acid as the catalyst system. Several different groups on nitrogen were investigated and the reaction conditions optimised for each group. The ring size and substitution around the ring system formed were also investigated with high yields and enantioselectivites obtained.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.680257  DOI: Not available
Keywords: QD241 Organic chemistry
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