New sucrose phenylpropanoid esters from Polygonum perfoliatum

Area of Science:

• Natural Product Chemistry
• Phytochemistry
• Organic Chemistry

Background:

• Polygonum perfoliatum is a plant species known for its diverse phytochemical constituents.
• Phenylpropanoid glycosides are a class of natural products with various reported biological activities.
• Sucrose esters are derivatives of sucrose, often found in plants and exhibiting unique chemical properties.

Purpose of the Study:

• To isolate and characterize phenylpropanoid glycosides from the whole plant of Polygonum perfoliatum.
• To identify novel compounds within this class of natural products.
• To elucidate the structures of isolated compounds using spectroscopic methods.

Main Methods:

• Isolation of compounds using various chromatographic techniques.
• Structure elucidation employing Nuclear Magnetic Resonance (NMR) spectroscopy.
• Mass spectrometry (MS) for molecular weight determination and fragmentation analysis.

Main Results:

• Five diferuloyl esters of sucrose were successfully isolated: helonioside B (1), and four new compounds (2-5).
• Vanicoside A and vanicoside B, identified as 1,3,6-tri-p-coumaroyl-6'-feruloylsucroses, were also isolated.
• Compounds 2-5 represent new members of the phenylpropanoid glycoside class, with compound 1 being previously known.

Conclusions:

• The study successfully identified and characterized several phenylpropanoid glycosides from Polygonum perfoliatum.
• The discovery of new compounds (2-5) contributes to the understanding of the phytochemical profile of this plant species.
• The findings provide valuable chemical data on sucrose-based phenylpropanoid glycosides.