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Functional feruloylated lipids, which are composed of 1(3)-feruloyl-monooleyl-glycerol (FMOG) and 1(3)-feruloyl-dioleyl-glycerol (FDOG), was prepared through the lipase-catalyzed irreversible transesterification between vinyl feruate (VF) and triolein (TO) in toluene. The nuclear magnetic resonance (NMR) and electrospray ionization-mass spectroscopy (ESI-MS) analysis confirmed the structure of VF...
A kind of polymeric prodrug of ibuprofen with glucose pendant was prepared through chemo-enzymatic method. The obtained polymeric prodrug was characterized by FT-IR, NMR and GPC. The molecular weight of the polymeric prodrug reached 2.126 × 104. Furthermore, the in vitro release behaviors of ibuprofen (raw drug) and the polymeric prodrug were investigated in pH 7.4 buffer solution at 37°C. It was...
4-Hydroxyphenylacetic acid (4-HPA) can inhibit monophenolase (IC50=0.79 mM) and activate diphenolase of mushroom tyrosinase with its increasing concentrations. The activation kinetics, analyzed by Lineweaver-Burk plots, indicated 4-HPA to be a competitive and uncompetitive mixed-type activator of diphenolase when L-DOPA was used as substrate. 4-HPA can not only inhibit the oxy form but also activate...
A facile procedure combining enzymatic resolution with chemical polymerization was developed to prepare optically active polymeric prodrug containing glucose. Polymerizable optically active (R)-1-O-vinyladipoyl-chlorphenesin ((R)-OVAC) was obtained in excellent optically purity (ee>99.9%) and high yield (~50%) in short time, and optically active (S)-N-vinyladipoyl-propranolol ((S)-NVAP) was obtained...
A facile enzymatic synthesis approach to prepare novel ester of ferulic acid through the lipase-catalyzed transesterification reaction of ethyl ferulate (EF) with tributyrin (TB) was investigated. The 1H NMR, 13C NMR and EI-MS analysis confirmed the formation of the end product, namely 1(3)-feruloyl-dibutyryl-glycerol (FDB). The influences of different enzyme source, enzyme loading, and water activity...
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