25826-69-1Relevant articles and documents
TWO POLYPHENOL GLUCOSIDES AND TANNINS FROM ROSA CYMOSA
Yoshida, Takashi,Feng, Wei-Sheng,Okuda, Takuo
, p. 1033 - 1036 (1993)
Two new polyphenol glucosides, rocymosins A and B, were isolated from Rosa cymosa and characterized as 3-O-(6'-O-galloyl)-β-D-glucopyranosyl-4-hydroxyphenethyl alcohol and 2'-O-β-D-glucopyranosyl-4,4',β-trihydroxy-dihydrochalcone, respectively.Eight known tannins, casuarinin, rugosin D, stenophyllanins A and B, (+)-catechin, procyanidin B-3, procyanidin B-3 3-O-gallate and catechin-(4α->6)-catechin-(4α->6)-epicatechin, were also isolated. Key Word Index - Rosa cymosa; Rosaceae; root; tannin; procyanidin; 3-O-(6'-O-galloyl)-β-D-glucopyranosyl-4-hydroxyphenethyl alcohol; rocymosin A; β-hydroxydihydrochalcone glucoside; rocymosin B.
CuO nanoparticles as an efficient catalyst for the synthesis of flavanones
Ahmady, Amanollah Zarei,Keshavarz, Mosadegh,Kardani, Maryam,Mohtasham, Neda
, p. 1841 - 1846 (2016/01/25)
CuO nanoparticle was found to be an efficient catalyst for the synthesis of flavanones derivatives from the reactions between 2-hydroxyacetophenones and aromatic aldehydes at room temperature. The protocol offers advantages in terms of higher yields, short reaction times, and mild reaction conditions, with reusability of the catalyst. The structures of the synthesized substituted flavanones were confirmed by their Melting point, FT-IR,1 HNMR,13 CNMR and mass spectral analysis.
Impact of mono- and disubstitution on the colorimetric dynamic covalent switching chalcone/flavanone scaffold
Muller, Brian M.,Mai, Jesse,Yocum, Reid A.,Adler, Marc J.
supporting information, p. 5108 - 5114 (2014/07/08)
The effect of aryl substitution on various aspects of the interconversion of ortho-hydroxychalcones and flavanones has been studied using multiple spectroscopic techniques. Derivatization of the core scaffold predictably alters the midpoint pH of this equilibration process suggesting its viability for application as a functional colorimetric molecular switch.