Funginocarterphenyls A-C: thiazole-containing p-terphenyls from Paulkirkia sp. KT4190

Area of Science:

• Natural Product Chemistry
• Mycology
• Organic Chemistry

Background:

• Thiazole-containing p-terphenyls have been previously isolated from actinomycete strains.
• Filamentous fungi represent a largely unexplored source of novel chemical entities.

Purpose of the Study:

• To isolate and characterize new p-terphenyl compounds from the fungus Paulkirkia sp.
• To investigate the chemical diversity of secondary metabolites produced by filamentous fungi.

Main Methods:

• Isolation and purification of compounds using chromatographic techniques.
• Structure elucidation using detailed Nuclear Magnetic Resonance (NMR) spectroscopy, including Hetero Multiple Bond Correlation (HMBC) analysis.
• Verification of structural assignments using Density Functional Theory (DFT)-based chemical shift calculations.

Main Results:

• Three novel thiazole-containing p-terphenyls, Funginocarterphenyls A-C, were identified.
• These compounds represent the first isolation of this chemical class from a filamentous fungus.
• The substitution pattern of the central benzene ring was definitively established.

Conclusions:

• Funginocarterphenyls A-C are novel natural products from a fungal source.
• This discovery expands the known structural diversity of p-terphenyls.
• Further investigation into the biosynthesis of these fungal metabolites is warranted.