Organocatalytic regioselective acylation of mono- and disaccaharides with various functionalized acid anhydrides has been developed. Acylation of octyl beta-D-glucopyranoside with acid anhydrides derived from alpha-amino acids, cinnamic acid, and gallic acid took place at C(4)-OH with 67-94% regioselectivity in the presence of catalyst 1. Regioselective acylation of disaccharides with functiona...

Acyl-CoA derivatives of several hydroxylated cinnamic acids have been synthesized in 30 to 50% yield via a. acyl phenyl thiol esters, b. acyl N-hydroxysuccinimide esters, and c. glucocinnamoyl derivatives. Properties of the intermediates have been determined. The cinnamyol-CoA thiol esters were characterized by their chromatographic behaviour and UV spectra. The molar extinction coefficients of...

Five new ?-conjugated chromophores derived from acrylic acid and acrylonitrile were synthesized their thermal photophysical behaviors analyzed. They designed through Knoevenagel condensations between arylacetylenebenzaldehydes a methylene group activated cyanoacetic malonic acids. The characterization of the target compounds was performed by Fourier transform infrared spectroscopy (FTIR), 1H nu...

Phenolic acids are an important group of plant secondary metabolites with various, valuable therapeutic properties. Apart from plants growing in the open air, tissue cultures can be an alternative source of the secondary metabolites. The yield of their accumulation in in vitro cultures can be increased by different methods, including culture medium supplementation with precursors, elicitors and...

Liquid column chromatography, planar chromatography (TLC) on modified and unmodified silica layers, reversed-phase high-pressure liquid chromatography (HPLC), as well as ESI-TOF MS and 1H-NMR have been used for separation, purification and identification of phenolic acids in the barks of Sambucus nigra and Viburnum opulus (Caprifoliaceae). By the use of these procedures three cinnamic acid deri...

M. D. Garcia, M. C. Ahumada and M. T. Saenz Departamento de Farmacologfa, Facultad de Farmacia, c/Profesor Garcia Gonzalez s/n, 41012 Sevilla, Spain Z. Naturforsch. 53c, 1093-1095 (1998); received April 8/October 7, 1998 Scrophularia frutescens. Cultured H ep-2 Cells, Cultured McCoy Cells, Phenolic Acids The cytostatic activity of seven phenolic acids: coumaric, caffeic, ferulic, gentisic, prot...

Neuroglobin (Ngb) is an intracellular, oxygen-binding neuronal protein with protective effects against ischemia and related pathological processes. To identify small molecules capable of inducing Ngb protein expression, which might have therapeutic benefit, we examined Ngb expression by Western blot in cultured HN33 (mouse hippocampal neuron ! N18TG2 neuroblastoma) cells. In addition to deferox...