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Ring‐opening oligomerization reactions using aluminium complexes of schiff's bases as initiators
Author(s) -
Le Borgne Alain,
Vincens Valérie,
Jouglard Muriel,
Spassky Nicolas
Publication year - 1993
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19930730106
Subject(s) - schiff base , chemistry , polymer chemistry , monomer , bifunctional , alkoxy group , aluminium , alkyl , enantiomer , polymerization , ring opening polymerization , stereochemistry , organic chemistry , catalysis , polymer
Bifunctional telechelics with defined structure can be prepared by oligomerization of oxiranes, β‐butyrolactone and L‐lactide using aluminium Schiff's base complexes as initiators. Chiral initiator (SALCENAlCl) shows a stereoelective character leading to preferential oligomerization of one enantiomer from a racemic monomer mixture. The reaction with β‐butyrolactone proceeds through O‐alkyl cleavage. Alkoxy Schiff's bases aluminium complexes are used for oligomerization of L‐lactide. All the prepared oligomers were fully characterized by IR, elemental analysis, 1 H and 13 C NMR and GPC.