Synthesis of heterocyclic monomers via Reissert chemistry
The chemistry of Reissert compounds has been used to synthesize activated difluorotetraketone monomers containing two coupled isoquinolyl moieties, linked at either the 1,1′- or 4,4′-positions. These monomers offer routes to novel families of poly(heteroarylene ether)s. New 4,4′-coupled bis(Reissert...
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Published in | Journal of polymer science. Part A, Polymer chemistry Vol. 48; no. 17; pp. 3856 - 3867 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Wiley Subscription Services, Inc., A Wiley Company
01.09.2010
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Online Access | Get more information |
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Summary: | The chemistry of Reissert compounds has been used to synthesize activated difluorotetraketone monomers containing two coupled isoquinolyl moieties, linked at either the 1,1′- or 4,4′-positions. These monomers offer routes to novel families of poly(heteroarylene ether)s. New 4,4′-coupled bis(Reissert compound) 9 containing 4,4′-diketo moieties failed to afford the desired difluorotetraketo monomer upon attempted rearrangement. However, analogous bis(Reissert compound) 19 containing 4,4′-dibenzyl units did so, via aldehyde condensation, hydrolysis of the intermediate ester and oxidation of the four benzylic moieties to keto groups; thus the novel difluorotetraketone monomer 10 was prepared. Novel bis(Reissert compound)s 24, 28, and 35 were synthesized from diacid chlorides and 4-(p-fluorobenzyl)isoquinoline. Rearrangement of 24 to the diketone 29, followed by oxidation of the 4-benzyl moieties resulted in difluorotetraketone monomer 30 containing a 1,1′-linked bisisoquinoline. The 1,1′-linked bis(isoquinolylfluorodiketo) monomer 38, isomeric with 10, was prepared from 4-(p-fluorobenzyl) Reissert compound 36 by condensation with terephthaldehyde, ester hydrolysis to diol 37, and oxidation. In the course of this effort, a number of new isoquinoline Reissert compounds were synthesized as model systems. |
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Bibliography: | http://dx.doi.org/10.1002/pola.24172 |
ISSN: | 0887-624X 1099-0518 |
DOI: | 10.1002/pola.24172 |