title: Lipase-catalyzed synthesis of hyperbranched poly-L-lactide in an ionic liquid.
abstract: Hyperbranched poly-L-lactides have been synthesized by eROP in [C4MIM][PF6] media. The bis(hydroxymethyl)butyric acid molecule was used as the AB2 core co-monomer and immobilized lipase B from Candida antarctica as biocatalyst. The degree of branching could be controlled by the reaction conditions, with the maximum achieved being 0.21. The successful achievement of the hyperbranched structure is attributed to the high solvent power of substrates and products in the ionic liquid besides sustained lipase activity.
authors.affiliation: Depto. Alimentos y Biotecnología, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, Mexico DF, 04510, Mexico.
authors.forename: María
authors.initials: M
authors.lastname: Mena
authors.forename: Alberto
authors.initials: A
authors.lastname: López-Luna
authors.forename: Keiko
authors.initials: K
authors.lastname: Shirai
authors.forename: Alberto
authors.initials: A
authors.lastname: Tecante
authors.forename: Miquel
authors.initials: M
authors.lastname: Gimeno
authors.forename: Eduardo
authors.initials: E
authors.lastname: Bárzana
mesh_terms: D002175:Candida / Q000201:enzymology*; D002384:Catalysis; D004800:Enzymes, Immobilized / Q000737:chemistry; D005656:Fungal Proteins / Q000737:chemistry; D052578:Ionic Liquids / Q000737:chemistry*; D007477:Ions / Q000737:chemistry; D008049:Lipase / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D011091:Polyesters / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry; D012997:Solvents / Q000737:chemistry; D013696:Temperature
chemical_list: D004800:Enzymes, Immobilized; D005656:Fungal Proteins; D052578:Ionic Liquids; D007477:Ions; D011091:Polyesters; D011108:Polymers; D012997:Solvents; C033616:poly(lactide); D008049:Lipase