A novel symmetrical pyrano-3-deoxyanthocyanidin from a Sorghum species

作者：Khalil Ali; Baltenweck Guyot Raymonde^*; Ocampo Torres Ruben; Albrecht Pierre

来源：Phytochemistry Letters, 2010, 3(2): 93-95.

DOI：10.1016/j.phytol.2010.02.003

• Sorghum bicolor var. bicolor (Moench)
• Structural analysis
• NMR
• Pyrano-3-deoxyanthocyanidin

Polyphenols are widespread components of higher plants. Sorghum is rich in polyphenols and known to contain a specific type, 3-deoxyanthocyanins, many of which remain uncharacterised. Here we report the structural determination of a new pigment isolated from red Sorghum bicolor var. bicolor (Moench) and characterised as 8-hydroxy-2-(4'-hydroxyphenyl)-5-(4 ''-hydroxyphenyl)-pyrano[4,3,2-de]1-ben-zopyrylium by MS, UV-vis and 2D NMR spectroscopy. This new symmetrical pyrano-3-deoxyanthocyanidin, containing apigeninidin as a base unit, displays structural features responsible for higher stability as compared to corresponding anthocyanins.

• 出版日期2010-6-11