title: Aluminum complexes based on pyridine substituted alcohols: synthesis, structure, and catalytic application in ROP.
abstract: A series of substituted pyridine dialcohols (2,6-bis(hydroxyalkyl)pyridines), 1-4, was used for the synthesis of various types of aluminum complexes. Aluminum methyl derivatives, 2-4a, were obtained by the reaction of AlMe3 with the corresponding ligand or transmetallation reactions of germylenes. Aluminum chloride complexes, 3-4b, were obtained by substitution of the Me group under the action of chlorinating agents. Methoxy-, 2-4c, or benzyloxy-, 2d, aluminum complexes were synthesized in transalkoxylation reaction of Me2Al(OX) (X = Me, Bn) by the corresponding ligand. All complexes obtained were thoroughly investigated by multinuclear NMR and X-ray analysis. It has been established that the structure of the ligand (number of carbon atoms) determines the nature of the complexes formed. Compounds were used as initiators of ring-opening polymerization of l-lactide and ε-caprolactone and showed moderate activity with controlled or immortal character.
authors.affiliation: Chemistry Department, Moscow State University, B-234 Leninskie Gory, 119991 Moscow, Russia. zaitsev@org.chem.msu.ru.
authors.forename: Marina M
authors.initials: MM
authors.lastname: Kireenko
authors.forename: Ekaterina A
authors.initials: EA
authors.lastname: Kuchuk
authors.forename: Kirill V
authors.initials: KV
authors.lastname: Zaitsev
authors.forename: Viktor A
authors.initials: VA
authors.lastname: Tafeenko
authors.forename: Yuri F
authors.initials: YF
authors.lastname: Oprunenko
authors.forename: Andrei V
authors.initials: AV
authors.lastname: Churakov
authors.forename: Elmira Kh
authors.initials: EKh
authors.lastname: Lermontova
authors.forename: Galina S
authors.initials: GS
authors.lastname: Zaitseva
authors.forename: Sergey S
authors.initials: SS
authors.lastname: Karlov