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Volumn 42, Issue 4, 2009, Pages 987-993

Syndiotactic-enriched poly(3-hydroxybutyrate)s via stereoselective ring-opening polymerization of racemic β-butyrolactone with discrete yttrium catalysts

Author keywords

[No Author keywords available]

Indexed keywords

BUTYROLACTONE; ISOTACTIC; MELTING TEMPERATURES; NMR SPECTROSCOPY; POLY(3-HYDROXYBUTYRATE); STEREO-SELECTIVE; SYNDIOTACTIC; SYNDIOTACTICITY; THERMAL PROPERTIES; YTTRIUM COMPLEXES;

EID: 66149118150     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma8022734     Document Type: Article
Times cited : (145)

References (39)
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    • Mecking, S. Ansew. Chem., Int. Ed. 2004, 43, 1078.
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    • Chem. Soc, These initiators have also shown good catalytic activities and good stereoselectivity for the ROP of racemic lactide
    • Rieth, L. R.; Moore, D. R.; Lobkovsky, E. B.; Coates, G. W. J. Am. Chem. Soc. 2002, 124, 15239. These initiators have also shown good catalytic activities and good stereoselectivity for the ROP of racemic lactide.
    • (2002) J. Am , vol.124 , pp. 15239
    • Rieth, L.R.1    Moore, D.R.2    Lobkovsky, E.B.3    Coates, G.W.4
  • 21
    • 36048984150 scopus 로고    scopus 로고
    • Amgoune, A.; Thomas, C. M.; Carpentier, J.-F. Pure Avvl. Chem. 2007, 79, 2013.
    • (c) Amgoune, A.; Thomas, C. M.; Carpentier, J.-F. Pure Avvl. Chem. 2007, 79, 2013.
  • 23
    • 33746191814 scopus 로고    scopus 로고
    • Preliminary communication. Amgoune, A.; Thomas, C. M.; Ilinca, S.; Roisnel, T.; Carpentier, J.-F. Ansew. Chem., Int. Ed. 2006, 45, 2782.
    • Preliminary communication. Amgoune, A.; Thomas, C. M.; Ilinca, S.; Roisnel, T.; Carpentier, J.-F. Ansew. Chem., Int. Ed. 2006, 45, 2782.
  • 24
    • 53849088593 scopus 로고    scopus 로고
    • We have recently reported that discrete bis(guanidinate) alkoxide complexes of lanthanides initiate the stereoselective ROP of rac-BBL to afford syndiotactic PHB (Pr up to 0.84) via a chain-end control mechanism, while they are surprisingly non-stereoselective for the ROP of rac-LA under strictly similar conditions: Ajellal, N, Lyubov, D. M, Sinenkov, M. A, Fukin, G. K, Cherkasov, A. V, Thomas, C. M, Carpentier, J.-F, Trifonov, A. A. Chem. Eur. J. 2008, 14, 5440
    • r up to 0.84) via a chain-end control mechanism, while they are surprisingly non-stereoselective for the ROP of rac-LA under strictly similar conditions: Ajellal, N.; Lyubov, D. M.; Sinenkov, M. A.; Fukin, G. K.; Cherkasov, A. V.; Thomas, C. M.; Carpentier, J.-F.; Trifonov, A. A. Chem. Eur. J. 2008, 14, 5440.
  • 25
    • 66549130438 scopus 로고    scopus 로고
    • 14,15 The synthesis and characterization of trityl substituted complex 3 will be reported in due course.
    • 14,15 The synthesis and characterization of trityl substituted complex 3 will be reported in due course.
  • 26
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    • 1H} NMR spectroscopy of reprecipitated polymers (see Supporting Information).
    • 1H} NMR spectroscopy of reprecipitated polymers (see Supporting Information).
  • 33
    • 66549124175 scopus 로고    scopus 로고
    • We conducted NMR-scale reactions with the yttrium isopropoxide catalyst which is easier to identify by 1H NMR spectroscopy. More, it is known that isopropoxide is usually a better initiating group than amido, N(SiMe 3)2,or -N(SiHMe2)2] for the ROP of cyclic esters. The solution structure of this isopropoxide species has already been reported.14b
    • 14b


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