Two new 2-(2-phenylethyl)chromones from Chinese eaglewood

Area of Science:

• Natural Product Chemistry
• Organic Chemistry
• Pharmacognosy

Background:

• Aquilaria sinensis, commonly known as Chinese eaglewood, is a valuable plant source.
• Chromone derivatives are known for their diverse biological activities.

Purpose of the Study:

• To isolate and characterize new compounds from Aquilaria sinensis.
• To elucidate the chemical structures of novel phenylethylchromones.

Main Methods:

• Isolation of compounds using chromatographic techniques.
• Structure elucidation via Mass Spectrometry (MS) and Nuclear Magnetic Resonance (NMR) spectroscopy.
• Comparison of spectral data with existing literature.

Main Results:

• Two new 2-(2-phenylethyl)chromone derivatives were successfully isolated.
• The structures were confirmed as (5S(*),6R(*),7S(*))-5,6,7-trihydroxy-2-(3-hydroxy-4-methoxyphenethyl)-5,6,7,8-tetrahydro-4H-chromen-4-one (1) and (5S(*),6R(*),7R(*))-5,6,7-trihydroxy-2-(3-hydroxy-4-methoxyphenethyl)-5,6,7,8-tetrahydro-4H-chromen-4-one (2).
• Detailed MS and NMR analyses provided unambiguous structural assignments.

Conclusions:

• The study successfully identified and characterized two new phenylethylchromone compounds from Aquilaria sinensis.
• The findings contribute to the understanding of the chemical constituents of Chinese eaglewood.
• The characterized compounds may serve as leads for further pharmacological investigations.