Procyanidin A2

Procyanidin A2
Names
IUPAC name
(2R,3R,8S,14R,15R)-2,8-bis(3,4-dihydroxyphenyl)-2,3,4,14-tetrahydro-8,14-methanobenzo[7,8][1,3]dioxocino[4,5-h]chromene-3,5,11,13,15-pentaol
Other names
Dimeric catechin
Procyanidin A2
Procyanidol A2
Proanthocyanidin A-2
Procyanidin dimer A2
(+)-Proanthocyanidin A2
Epicatechin-(2β→7,4β→8)-epicatechin
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
Properties
C30H24O12
Molar mass 576.51 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YesYN ?)
Infobox references

Procyanidin A2 is a A type proanthocyanidin.

It is found in avocado,[1] chestnut,[2][3] cranberry juice concentrate,[4] lychee fruit pericarb,[5] peanut[4] skins,[6] Cinchona cortex, cinnamon cortex, Urvillea ulmaceae,[7] and Ecdysanthera utilis.[8]

Synthesis

Procyanidin B2 can be converted into procyanidin A2 by radical oxidation using 1,1-diphenyl-2-picrylhydrazyl (DPPH) radicals under neutral conditions.[9]

References

  1. ↑ Proanthocyanidin-A-2 on liberherbarum.com
  2. ↑ Facino, R. Maffei; Carini, M.; Brambilla, A.; Bombardelli, E.; Morazzoni, P. (1996). "Proanthocyanidin-A2: a new polyphenol". Cosmetics & Toiletries.
  3. ↑ Kimura, H; Ogawa, S; Akihiro, T; Yokota, K (2011). "Structural analysis of A-type or B-type highly polymeric proanthocyanidins by thiolytic degradation and the implication in their inhibitory effects on pancreatic lipase". J Chromatogr A. 1218: 7704–12. PMID 21803362. doi:10.1016/j.chroma.2011.07.024.
  4. 1 2 Koerner Jayma, Hsu Victor, Lee Jungmin, Kennedy, James, (2009). "Determination of Proanthocyanidin A2 Content in Phenolic Polymer Isolates by Reversed-Phase High Performance Liquid Chromatography". Journal of Chromatography A. 1216 (9): 1403–1409. PMID 19168185. doi:10.1016/j.chroma.2008.12.086.
  5. ↑ Sarni-Manchado P, Le Roux E, Le Guerneve C, Lozano Y, Cheynier V. Phenolic composition of litchi fruit pericarp" J Agric Food Chem 2000;48(12):5995-6002.
  6. ↑ Hongxiang Lou; Yamazaku Y.; Sasaku T.; Uchida M.; Tanaka H.; Oka S. (1999). "A-type proanthocyanidins from peanut skins". Phytochemistry. 51 (2): 297–308. doi:10.1016/S0031-9422(98)00736-5.
  7. ↑ Dias, Suziane A.; Cardoso (Gazio), Flávia P.; Santin, Silvana M. O.; Da Costa, Willian F.; Vidotti, Gentil J.; De Souza, Maria Conceição; Sarragiotto, Maria Helena (2009). "Free radical scavenging activity and chemical constituents of Urvillea ulmaceae". Pharmaceutical Biology. 47 (8): 717–720. doi:10.1080/13880200902933336.
  8. ↑ Lin, Lie-Chwen; Kuo, Yuh-Chi; Chou, Cheng-Jen (2002). "Immunomodulatory Proanthocyanidins from Ecdysantherautilis". Journal of Natural Products. 65 (4): 505–8. PMID 11975489. doi:10.1021/np010414l.
  9. ↑ Kondo, Kazunari; Kurihara, Masaaki; Fukuhara, Kiyoshi; Tanaka, Takashi; Suzuki, Takashi; Miyata, Naoki; Toyoda, Masatake (2000). "Conversion of procyanidin B-type (catechin dimer) to A-type: evidence for abstraction of C-2 hydrogen in catechin during radical oxidation". Tetrahedron Letters. 41 (4): 485–488. doi:10.1016/S0040-4039(99)02097-3.


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.