F:Flammable;
57-11-4Relevant articles and documents
Burton
, p. 4117 (1949)
Anti-diabetic potential of ursolic acid stearoyl glucoside: A new triterpenic gycosidic ester from Lantana camara
Kazmi, Imran,Rahman, Mahfoozur,Afzal, Muhammad,Gupta, Gaurav,Saleem, Shakir,Afzal, Obaid,Shaharyar, Md.Adil,Nautiyal, Ujjwal,Ahmed, Sayeed,Anwar, Firoz
, p. 142 - 146 (2012)
A new stearoyl glucoside of ursolic acid, urs-12-en-3β-ol-28-oic acid 3β-d-glucopyranosyl-4′-octadecanoate and other compounds were isolated from the leaves of Lantana camara L. The structure of this new glycoside was elucidated and established by standard spectroscopic methods. In streptozotocin-induced diabetic rats it showed significant reduction in blood glucose level. Crown Copyright
ALL-CIS-3,6,9,12,15-OCTADECAPENTAENOIC ACID: A PROBLEM OF RESOLUTION IN THE GC ANALYSIS OF MARINE FATTY ACIDS
Napolitano, G. E.,Ratnayake, W. M. N.,Ackman, R. G.
, p. 1751 - 1756 (1988)
The GC properties of 18:5n3 (all-cis-3,6,9,12,15-octadecapentaenoic acid) of algal origin are described for analysis on the popular polyglycol liquid phase Carbowax-20M "bonded" in flexible fused silica open-tubular columns.It is shown with oyster lipids that this fatty acid could be confused with early eluting 20:1 isomers such as the 20:1n11, common in marine animal oils and lipids, and coincides exactly with 20:1n15 of plant origin.Partial hydrazine reduction is demonstrated as a useful technique for confirming the structure of 18:5n3.Key Word Index-Octadecapentaenoic acid; gas-liquid chromatography; phytoplankter fatty acids; marine lipids; hydrazine reduction.
Hydrolysis of amides to carboxylic acids catalyzed by Nb2O5
Siddiki,Rashed, Md. Nurnobi,Touchy, Abeda Sultana,Jamil, Md. A. R.,Jing, Yuan,Toyao, Takashi,Maeno, Zen,Shimizu, Ken-Ichi
, p. 1949 - 1960 (2021/03/26)
Hydrolysis of amides to carboxylic acids is an industrially important reaction but is challenging due to the difficulty of cleaving the resonance stabilized amidic C-N bond. Twenty-three heterogeneous and homogenous catalysts were examined in the hydrolysis of acetamide. Results showed that Nb2O5was the most effective heterogeneous catalyst with the greatest yield of acetic acid. A series of Nb2O5catalysts calcined at various temperatures were characterized and tested in the hydrolysis of acetamide to determine the effects of crystal phase and surface properties of Nb2O5on catalytic performance. The high catalytic performance observed was attributed mainly to the facile activation of the carbonyl bond by Lewis acid sites that function even in the presence of basic inhibitors (NH3and H2O). The catalytic studies showed the synthetic advantages of the present method, such as simple operation, catalyst recyclability, additive free, solvent free, and wide substrate scope (>40 examples; up to 95% isolated yield).
Homogeneous catalytic hydrogenation of lipids in aqueous dispersions and bacterial cell membranes with an efficient water-soluble Pd(II)-sulfosalan catalyst, Na2[Pd(HSS)]
Bunda, Szilvia,Gombos, Réka,Joó, Ferenc,Nagyházi, Brigitta
, (2020/09/17)
The recently synthesized water-soluble Na2[Pd(HSS)] (Na2HSS = hydrogenated sulfonated salen) was shown to be a non-toxic, active catalyst for modification of model and biomembranes by homogeneous catalytic hydrogenation. Hydrogenation of the unsaturated fatty acyl residues in soy-bean lecithin liposomes and in biomembranes of intact Pseudomonas putida F1 cells was accompanied by substantial cis-trans isomerization around the C[dbnd]C double bonds. The hydrogenations could be run in aqueous media under mild conditions (25 °C, 1 bar H2). Partial saturation (up to 10% conversion) of the membrane lipids of P. putida F1 did not damage the cells.
