Sulfur-containing compounds from Clinacanthus siamensis

Area of Science:

• Phytochemistry
• Medicinal Chemistry
• Pharmacology

Background:

• Clinacanthus siamensis is a plant used in traditional medicine.
• Natural products are a rich source of bioactive compounds.
• Sulfur-containing compounds often exhibit significant biological activities.

Purpose of the Study:

• To isolate and characterize novel sulfur-containing compounds from Clinacanthus siamensis leaves.
• To evaluate the isolated compounds for antimalarial and antimycobacterial activities.

Main Methods:

• Phytochemical investigation of Clinacanthus siamensis leaf extract.
• Isolation and purification of compounds using chromatographic techniques.
• Structure elucidation using spectroscopic data (NMR, MS).
• In vitro testing for antimalarial and antimycobacterial activity.

Main Results:

• Two new sulfur-containing compounds, trans-3-methylsulfonyl-2-propenol (1) and trans-3-methylsulfinyl-2-propenol (2), were identified.
• Three known compounds, trans-3-methylthioacrylamide (3), entadamide A (4), and entadamide C (5), were also isolated.
• The structures of the new compounds were confirmed through comprehensive spectroscopic analysis.
• Preliminary screening for antimalarial and antimycobacterial activity was conducted.

Conclusions:

• The study successfully isolated and identified five compounds from Clinacanthus siamensis, including two novel sulfur-containing molecules.
• The isolated compounds represent potential leads for the development of new antimalarial and antimycobacterial agents.
• Further investigation is warranted to explore the therapeutic potential of these compounds.