1014-83-1Relevant articles and documents
Three secoiridoid glucosides from Jasminum lanceolarium
Shen, Ya-Ching,Lin, Shao-Ling,Chein, Chyh-Chung
, p. 891 - 895 (1997)
Three new secoiridoid glycosides, jaslanceosides C E, in addition to jaslanceosides A and B. 10-hydroxyoleoside dimethyl ester and jasminoside were isolated from the leaves and stems of Jasminum lanceolarium. The structures of these compounds were elucidated on the basis of spectral analysis and chemical correlation with known compounds.
New cardenolide and acylated lignan glycosides from the aerial parts of Asclepias curassavica
Warashina, Tsutomu,Shikata, Kimiko,Miyase, Toshio,Fujii, Satoshi,Noro, Tadataka
, p. 1159 - 1163 (2008)
Three new cardenolide glycosides and six new acylated lignan glycosides were obtained along with nineteen known compounds from the aerial parts of Asclepias curassavica L. (Asclepiadaceae). The structure of each compound was determined based on interpreta
Antioxidative properties of phenolic antioxidants isolated from corn steep liquor
Niwa, Toshio,Dpi, Umeyuki,Kato, Yoji,Osawa, Toshihiko
, p. 177 - 182 (2001)
With the immersion of corn into dilute sulfur oxide during starch-manufacturing processes, corn steep liquor (CSL) remains as leftover material. CSL is often used for fermentation, but its components are not fully understood. To determine the properties of CSL, 12 p-coumaric acid-related compounds were isolated from an ethyl acetate extract of CSL with the guidance of antioxidative activity on the rabbit erythrocyte membrane ghost system. The activity of these compounds was compared against oxidative damages, and it was elucidated that the activity of p-coumaric acid derivatives was mainly affected by their functional groups at the 3-position and less, by the conjugated side chain. Moreover, p-coumaric acid derivatives exhibited inhibitory activity stronger than that of tocopherols and ascorbic acid on peroxynitrite-mediated lipoprotein nitration. These findings that p-coumaric acid derivatives, which might play a beneficial role against oxidative damage, exist in CSL suggest this byproduct might be a useful resource of phenolic antioxidants.
A Thorough Study on the Photoisomerization of Ferulic Acid Derivatives
Moni, Lisa,Banfi, Luca,Basso, Andrea,Mori, Alessia,Risso, Federica,Riva, Renata,Lambruschini, Chiara
supporting information, p. 1737 - 1749 (2021/03/23)
A thorough study on the (E) to (Z) photoisomerization of ferulic acid derivatives (esters, amides of all types, and ketones) was carried out. At the photostationary state, only aliphatic or benzylic tertiary amides reach a nearly complete conversion of (E) isomers into the (Z) ones, whereas for esters, primary and secondary amides or aromatic tertiary amides mixtures of (Z)/(E) ranging from 7 : 93 to 72 : 28 are observed. Ketones show rather limited photoisomerization. However, (Z) ketones may be obtained by the reaction of organometal compounds with an isomerized (Z) Weinreb amide.
Photoisomerization of ionic liquid ammonium cinnamates: One-pot synthesis-isolation of Z-cinnamic acids
Salum, Maria L.,Robles, Cecilia J.,Erra-Balsells, Rosa
supporting information; experimental part, p. 4808 - 4811 (2011/01/03)
Photoisomerization presents the only direct method for contra-thermodynamic E-Z isomerization of olefins. Synthetic applications of this method have been limited by its reversible nature, which leads to a photostationary-state mixture of both isomers. For the first time, a highly efficient one-pot preparation-isolation of solid ionic liquid Z-cinnamic acids by photoisomerization in acetonitrile solution of ionic liquid E-cinnamic acids is described.
