130752-21-5Relevant articles and documents
Convenient syntheses of neurotrophic americanol A and isoamericanol A by HRP catalyzed oxidative coupling of caffeic acid
Matsumoto, Keiji,Takahashi, Hironobu,Miyake, Youko,Fukuyama, Yoshiyasu
, p. 3185 - 3186 (1999)
Extremely simple syntheses of americanol A (1) and isoamericanol A (2) having intriguing neurotrophic properties have been accomplished by HRP catalyzed oxidative coupling of caffeic acid.
Chemical cross-linking gelatin with natural phenolic compounds as studied by high-resolution NMR spectroscopy
Zhang, Xiaoqing,Do, My Dieu,Casey, Philip,Sulistio, Adrian,Qiao, Greg G.,Lundin, Leif,Lillford, Peter,Kosaraju, Shansha
experimental part, p. 1125 - 1132 (2011/01/03)
Cross-linking gelatin with natural phenolic compound caffeic acid (CA) or tannic acid (TA) above pH 9 resulted in formation of insoluble hydrogels. The cross-linking reactivity was controlled by variation of pH, the concentration of the gelatin solution, or the amount of CA or TA used in the reaction. The cross-linking chemistry was studied by high-resolution NMR technique in both solution and solid state via investigation on small molecular model systems or using 13C enriched caffeic acid (LCA) in the reaction with gelatin. Direct evidence was obtained to confirm the chemical reactions occurring between the phenolic reactive sites of the phenolic compounds and the amino groups in gelatin to form C-N covalent bonds as cross-linking linkages in gelatin matrix. The cross-linked network was homogeneous on a scale of 2-3 nm. The cross-linking resulted in a significant decrease in the molecular mobility of the hydrogels, while the modulus of the films remained at high values at high temperatures.
RABDOSIIN, A NEW ROSMARINIC ACID DIMER WITH A LIGNAN SKELETON, FROM RABDOSIA JAPONICA
Agata, Isao,Hatano, Tsutomu,Nishibe, Sansei,Okuda, Takuo
, p. 3223 - 3225 (2007/10/02)
A rosmarinic acid dimer named rabdosiin (1) was isolated from the stem of Rabdosia japonica Hara (Labiatae).Its struture was determined including the absolute configurations at four asymmetric centers.
